Table of Iowa ZIP Codes with list of cities and counties and population for each ZIP Code.| ZIP | City | County | Population |
|---|
| 50001 | Ackworth city, Sandyville city | Warren County | 653 |
| 50002 | Adair city | Adair County, Audubon County, Guthrie County | 1,529 |
| 50003 | Adel city, De Soto city, Van Meter city, Waukee city | Dallas County | 9,048 |
| 50005 | Albion city | Marshall County | 967 |
| 50006 | Alden city, Buckeye city, Popejoy city | Franklin County, Hamilton County, Hardin County | 1,642 |
| 50007 | Alleman city, Ankeny city | Polk County | 551 |
| 50008 | Allerton city | Wayne County | 778 |
| 50009 | Altoona city, Bondurant city, Des Moines city, Pleasant Hill city | Polk County | 20,580 |
| 50010 | Ames city | Story County | 34,036 |
| 50012 | Ames city | Story County | 2,284 |
| 50013 | Ames city | Story County | 3,732 |
| 50014 | Ames city | Boone County, Story County | 30,801 |
| 50020 | Anita city | Adair County, Audubon County, Cass County, Guthrie County | 1,269 |
| 50021 | Ankeny city, Saylorville CDP | Polk County | 27,550 |
| 50022 | Atlantic city | Audubon County, Cass County, Shelby County | 8,677 |
| 50023 | Ankeny city, Saylorville CDP | Polk County | 42,550 |
| 50025 | Audubon city, Gray city | Audubon County, Guthrie County | 2,986 |
| 50026 | Bagley city | Greene County, Guthrie County | 487 |
| 50027 | Barnes City city | Mahaska County, Poweshiek County | 352 |
| 50028 | Baxter city | Jasper County, Marshall County | 1,642 |
| 50029 | Bayard city | Greene County, Guthrie County | 544 |
| 50031 | Beaver city | Boone County | 60 |
| 50032 | | Polk County | 645 |
| 50033 | Bevington city | Madison County | 16 |
| 50034 | Blairsburg city | Hamilton County, Wright County | 408 |
| 50035 | Altoona city, Bondurant city | Polk County | 9,144 |
| 50036 | Boone city, Fraser city | Boone County, Hamilton County | 16,373 |
| 50038 | Van Meter city, Waukee city, West Des Moines city | Dallas County | 266 |
| 50039 | Bouton city | Boone County, Dallas County | 542 |
| 50040 | Boxholm city | Boone County | 123 |
| 50041 | Bradford CDP | Franklin County | 98 |
| 50042 | Brayton city | Audubon County, Cass County | 201 |
| 50044 | Bussey city, Hamilton city | Mahaska County, Marion County, Monroe County | 1,008 |
| 50046 | Cambridge city, Huxley city | Polk County, Story County | 1,818 |
| 50047 | Carlisle city, Des Moines city, Hartford city, Pleasant Hill city | Polk County, Warren County | 6,447 |
| 50048 | Casey city | Adair County, Guthrie County | 904 |
| 50049 | Chariton city, Williamson city | Lucas County, Marion County, Wayne County | 6,257 |
| 50050 | Churdan city | Calhoun County, Carroll County, Greene County | 678 |
| 50051 | Clemons city, St. Anthony city | Marshall County | 288 |
| 50052 | Clio city | Wayne County | 99 |
| 50054 | Colfax city, Valeria city | Jasper County | 3,191 |
| 50055 | Collins city | Jasper County, Marshall County, Story County | 1,213 |
| 50056 | Colo city | Story County | 1,178 |
| 50057 | | Marion County | 283 |
| 50058 | Coon Rapids city | Audubon County, Carroll County, Greene County, Guthrie County | 1,790 |
| 50060 | Corydon city | Wayne County | 2,581 |
| 50061 | Cumming city, Norwalk city, West Des Moines city | Dallas County, Madison County, Polk County, Warren County | 2,466 |
| 50062 | Melcher-Dallas city | Marion County | 733 |
| 50063 | Dallas Center city, Grimes city | Dallas County | 2,548 |
| 50064 | Dana city | Boone County, Greene County | 114 |
| 50065 | Davis City city, Pleasanton city | Decatur County | 584 |
| 50066 | Dawson city | Dallas County | 239 |
| 50067 | Decatur City city | Decatur County | 346 |
| 50068 | Derby city | Lucas County, Wayne County | 262 |
| 50069 | De Soto city | Dallas County | 1,070 |
| 50070 | Dexter city, Diamondhead Lake CDP | Adair County, Dallas County, Guthrie County, Madison County | 1,113 |
| 50071 | Dows city | Franklin County, Wright County | 967 |
| 50072 | Dexter city, Earlham city | Dallas County, Madison County | 2,849 |
| 50073 | Elkhart city | Polk County | 1,092 |
| 50074 | Beaconsfield city, Ellston city, Sun Valley Lake CDP | Ringgold County, Union County | 292 |
| 50075 | Ellsworth city | Hamilton County | 741 |
| 50076 | Exira city | Audubon County, Guthrie County | 1,498 |
| 50078 | Ferguson city | Marshall County | 100 |
| 50101 | Galt city | Wright County | 50 |
| 50102 | Garden City CDP | Hardin County | 151 |
| 50103 | Garden Grove city, Le Roy city | Decatur County | 380 |
| 50104 | Gibson city | Keokuk County, Mahaska County, Poweshiek County | 74 |
| 50105 | Gilbert city | Story County | 1,106 |
| 50106 | Gilman city | Jasper County, Marshall County, Poweshiek County, Tama County | 971 |
| 50107 | Grand Junction city | Boone County, Greene County | 951 |
| 50108 | Grand River city | Clarke County, Decatur County | 409 |
| 50109 | Granger city, Johnston city | Dallas County, Polk County | 3,230 |
| 50110 | Gray city | Audubon County | 36 |
| 50111 | Granger city, Grimes city, Johnston city, Urbandale city | Dallas County, Polk County | 15,491 |
| 50112 | Grinnell city, Oakland Acres city | Jasper County, Poweshiek County | 11,885 |
| 50115 | Guthrie Center city, Lake Panorama CDP | Guthrie County | 2,653 |
| 50116 | Hamilton city, Marysville city | Marion County | 170 |
| 50117 | | Audubon County | 149 |
| 50118 | Hartford city | Warren County | 846 |
| 50119 | Harvey city | Marion County | 310 |
| 50120 | Haverhill city | Marshall County | 392 |
| 50122 | Hubbard city | Hardin County | 1,419 |
| 50123 | Humeston city, Le Roy city | Clarke County, Decatur County, Lucas County, Wayne County | 799 |
| 50124 | Alleman city, Huxley city | Polk County, Story County | 4,600 |
| 50125 | Indianola city, Spring Hill city | Warren County | 20,228 |
| 50126 | Bradford CDP, Iowa Falls city, Owasa city | Franklin County, Hardin County | 6,507 |
| 50127 | | Jasper County | 0 |
| 50128 | Jamaica city | Dallas County, Greene County, Guthrie County | 366 |
| 50129 | Jefferson city | Greene County, Guthrie County | 5,257 |
| 50130 | Jewell Junction city | Hamilton County | 1,592 |
| 50131 | Grimes city, Johnston city, Urbandale city | Polk County | 23,577 |
| 50132 | Kamrar city | Hamilton County | 367 |
| 50133 | Kellerton city | Decatur County, Ringgold County | 482 |
| 50134 | Kelley city | Boone County, Story County | 783 |
| 50135 | Kellogg city | Jasper County | 1,474 |
| 50136 | Keswick city, Thornburg city | Iowa County, Keokuk County | 450 |
| 50137 | | Jasper County | 88 |
| 50138 | Knoxville city | Marion County | 11,994 |
| 50139 | Lacona city | Lucas County, Marion County, Warren County | 978 |
| 50140 | Lamoni city | Decatur County, Ringgold County | 2,945 |
| 50141 | Laurel city | Jasper County, Marshall County | 460 |
| 50142 | Le Grand city | Marshall County | 786 |
| 50143 | Leighton city | Mahaska County, Marion County | 548 |
| 50144 | Decatur City city, Leon city | Decatur County | 2,594 |
| 50145 | | Warren County | 55 |
| 50146 | Linden city | Dallas County, Guthrie County | 424 |
| 50147 | Lineville city | Decatur County, Wayne County | 298 |
| 50148 | Liscomb city | Marshall County | 364 |
| 50149 | Lorimor city | Madison County, Union County | 993 |
| 50150 | Lovilia city | Marion County, Monroe County | 1,009 |
| 50151 | Lucas city | Lucas County, Warren County | 634 |
| 50152 | Luther city | Boone County | 165 |
| 50153 | Lynnville city | Jasper County, Mahaska County, Poweshiek County | 928 |
| 50154 | McCallsburg city | Hardin County, Story County | 602 |
| 50155 | Macksburg city | Adair County, Madison County, Union County | 175 |
| 50156 | Luther city, Madrid city | Boone County, Dallas County, Polk County | 4,903 |
| 50157 | Malcom city | Poweshiek County | 679 |
| 50158 | Green Mountain CDP, Le Grand city, Marshalltown city | Marshall County, Tama County | 31,241 |
| 50160 | Martensdale city | Warren County | 529 |
| 50161 | Maxwell city | Jasper County, Polk County, Story County | 2,178 |
| 50162 | Melbourne city | Jasper County, Marshall County | 1,339 |
| 50163 | Melcher-Dallas city | Marion County | 741 |
| 50164 | Menlo city | Adair County, Guthrie County | 614 |
| 50165 | Millerton city | Wayne County | 39 |
| 50166 | Milo city, Sandyville city | Warren County | 1,768 |
| 50167 | Minburn city | Dallas County | 882 |
| 50168 | Mingo city | Jasper County, Polk County | 946 |
| 50169 | Mitchellville city | Jasper County, Polk County | 3,151 |
| 50170 | Monroe city | Jasper County, Marion County | 3,159 |
| 50171 | Barnes City city, Montezuma city | Mahaska County, Poweshiek County | 2,528 |
| 50173 | Montour city | Tama County | 760 |
| 50174 | Murray city | Clarke County, Union County | 1,372 |
| 50201 | Ames city, Nevada city | Story County | 8,266 |
| 50206 | New Providence city | Hardin County, Marshall County, Story County | 470 |
| 50207 | New Sharon city | Mahaska County, Poweshiek County | 2,305 |
| 50208 | Lambs Grove city, Newton city | Jasper County | 20,424 |
| 50210 | New Virginia city | Clarke County, Madison County, Warren County | 1,457 |
| 50211 | Cumming city, Des Moines city, Norwalk city | Madison County, Warren County | 14,905 |
| 50212 | Beaver city, Fraser city, Ogden city | Boone County | 2,979 |
| 50213 | Osceola city | Clarke County | 7,366 |
| 50214 | | Marion County | 787 |
| 50216 | Lake Panorama CDP, Panora city | Dallas County, Guthrie County | 2,833 |
| 50217 | Boxholm city, Paton city | Boone County, Greene County, Webster County | 483 |
| 50218 | Patterson city | Madison County | 274 |
| 50219 | Pella city | Mahaska County, Marion County | 13,465 |
| 50220 | Berkley city, Perry city | Boone County, Dallas County, Greene County | 9,103 |
| 50222 | East Peru city | Clarke County, Madison County | 445 |
| 50223 | Boxholm city, Fraser city, Pilot Mound city | Boone County | 315 |
| 50225 | Pleasantville city | Marion County, Warren County | 3,245 |
| 50226 | Ankeny city, Polk City city, Sheldahl city | Polk County, Story County | 6,566 |
| 50227 | Popejoy city | Franklin County | 90 |
| 50228 | Prairie City city | Jasper County, Marion County, Polk County | 2,661 |
| 50229 | Bevington city, Patterson city | Madison County, Warren County | 1,094 |
| 50230 | Garden City CDP, Radcliffe city | Hamilton County, Hardin County, Story County | 979 |
| 50231 | Randall city | Hamilton County | 135 |
| 50232 | Reasnor city | Jasper County | 604 |
| 50233 | Redfield city | Dallas County, Guthrie County | 1,405 |
| 50234 | Rhodes city | Jasper County, Marshall County | 469 |
| 50235 | Rippey city | Boone County, Dallas County, Greene County | 304 |
| 50236 | Roland city | Hamilton County, Story County | 1,783 |
| 50237 | Runnells city | Jasper County, Marion County, Polk County | 3,269 |
| 50238 | Russell city | Lucas County, Wayne County | 1,400 |
| 50239 | St. Anthony city | Marshall County, Story County | 79 |
| 50240 | Bevington city, Martensdale city, St. Charles city, St. Marys city | Madison County, Warren County | 2,310 |
| 50241 | St. Marys city | Warren County | 116 |
| 50242 | Searsboro city | Jasper County, Poweshiek County | 519 |
| 50243 | Sheldahl city, Slater city | Boone County, Polk County, Story County | 349 |
| 50244 | Alleman city, Sheldahl city, Slater city | Boone County, Polk County, Story County | 1,845 |
| 50246 | Stanhope city | Hamilton County | 732 |
| 50247 | State Center city | Marshall County, Story County | 2,468 |
| 50248 | Story City city | Boone County, Hamilton County, Story County | 4,072 |
| 50249 | Stratford city | Boone County, Hamilton County, Webster County | 1,298 |
| 50250 | Stuart city | Adair County, Guthrie County | 2,440 |
| 50251 | Sully city | Jasper County, Mahaska County | 1,432 |
| 50252 | Swan city | Marion County, Warren County | 230 |
| 50254 | Thayer city | Union County | 324 |
| 50255 | Thornburg city | Keokuk County | 71 |
| 50256 | | Mahaska County, Marion County | 565 |
| 50257 | Truro city | Clarke County, Madison County, Warren County | 1,201 |
| 50258 | Union city, Whitten city | Hardin County, Marshall County | 949 |
| 50261 | De Soto city, Van Meter city, West Des Moines city | Dallas County, Madison County | 2,935 |
| 50262 | Van Wert city | Decatur County | 238 |
| 50263 | Clive city, Urbandale city, Waukee city, West Des Moines city | Dallas County | 24,074 |
| 50264 | Le Roy city, Weldon city | Clarke County, Decatur County | 527 |
| 50265 | Clive city, West Des Moines city, Windsor Heights city | Polk County, Warren County | 32,540 |
| 50266 | West Des Moines city | Dallas County, Polk County | 35,088 |
| 50268 | What Cheer city | Keokuk County, Mahaska County | 1,045 |
| 50269 | Whitten city | Hardin County | 128 |
| 50271 | Williams city | Hamilton County, Wright County | 605 |
| 50272 | Williamson city | Lucas County | 163 |
| 50273 | Patterson city, Winterset city | Adair County, Madison County | 8,407 |
| 50274 | Wiota city | Cass County | 146 |
| 50275 | Woodburn city | Clarke County, Lucas County | 488 |
| 50276 | Woodward city | Boone County, Dallas County | 2,402 |
| 50277 | Lake Panorama CDP, Yale city | Dallas County, Guthrie County | 507 |
| 50278 | Zearing city | Story County | 716 |
| 50309 | Des Moines city | Polk County | 9,117 |
| 50310 | Des Moines city, Urbandale city | Polk County | 31,820 |
| 50311 | Des Moines city | Polk County | 15,979 |
| 50312 | Des Moines city, West Des Moines city | Polk County | 15,740 |
| 50313 | Ankeny city, Des Moines city, Saylorville CDP | Polk County | 18,762 |
| 50314 | Des Moines city | Polk County | 10,816 |
| 50315 | Des Moines city | Polk County | 35,698 |
| 50316 | Des Moines city | Polk County | 15,991 |
| 50317 | Altoona city, Ankeny city, Des Moines city, Pleasant Hill city | Polk County | 36,051 |
| 50319 | Des Moines city | Polk County | 0 |
| 50320 | Des Moines city | Polk County, Warren County | 23,252 |
| 50321 | Des Moines city, Norwalk city, West Des Moines city | Polk County, Warren County | 8,561 |
| 50322 | Clive city, Des Moines city, Johnston city, Urbandale city | Polk County | 31,736 |
| 50323 | Clive city, Grimes city, Urbandale city | Dallas County, Polk County | 16,117 |
| 50324 | Clive city, Windsor Heights city | Polk County | 5,208 |
| 50325 | Clive city, Urbandale city, Waukee city, Windsor Heights city | Dallas County, Polk County | 18,323 |
| 50327 | Altoona city, Des Moines city, Pleasant Hill city | Polk County | 12,303 |
| 50401 | Mason City city, Plymouth city, Portland CDP, Rock Falls city | Cerro Gordo County | 29,024 |
| 50420 | Alexander city | Franklin County, Wright County | 395 |
| 50421 | Belmond city | Wright County | 2,774 |
| 50423 | Britt city, Duncan CDP, Hutchins CDP | Hancock County | 2,429 |
| 50424 | Buffalo Center city, Rake city | Kossuth County, Winnebago County | 1,622 |
| 50426 | Carpenter city | Mitchell County | 96 |
| 50427 | Chapin CDP | Franklin County | 160 |
| 50428 | Clear Lake city, Ventura city | Cerro Gordo County | 9,117 |
| 50430 | Corwith city | Hancock County, Humboldt County, Kossuth County, Wright County | 371 |
| 50431 | Coulter city | Franklin County | 200 |
| 50432 | Crystal Lake city | Hancock County | 265 |
| 50433 | Dougherty city | Butler County, Cerro Gordo County, Floyd County, Franklin County | 218 |
| 50434 | Fertile city | Cerro Gordo County, Winnebago County, Worth County | 412 |
| 50435 | Floyd city | Floyd County | 646 |
| 50436 | Crystal Lake city, Forest City city, Leland city, Miller CDP | Hancock County, Winnebago County | 5,742 |
| 50438 | Duncan CDP, Garner city, Hayfield CDP, Miller CDP | Hancock County | 4,077 |
| 50439 | Goodell city | Hancock County | 318 |
| 50440 | Grafton city | Mitchell County, Worth County | 373 |
| 50441 | Bradford CDP, Coulter city, Hampton city, Hansell city | Franklin County | 5,284 |
| 50444 | Fertile city, Hanlontown city | Cerro Gordo County, Worth County | 325 |
| 50446 | Joice city | Winnebago County, Worth County | 517 |
| 50447 | Kanawha city | Hancock County, Wright County | 1,290 |
| 50448 | Bolan CDP, Kensett city | Worth County | 632 |
| 50449 | Klemme city | Cerro Gordo County, Hancock County | 865 |
| 50450 | Lake Mills city, Scarville city | Winnebago County, Worth County | 2,968 |
| 50451 | Lakota city | Kossuth County | 399 |
| 50452 | Coulter city, Latimer city | Franklin County | 944 |
| 50453 | Leland city | Winnebago County | 580 |
| 50454 | Little Cedar CDP | Mitchell County | 65 |
| 50455 | McIntire city, Meyer CDP | Mitchell County | 405 |
| 50456 | Manly city | Cerro Gordo County, Worth County | 1,762 |
| 50457 | Meservey city | Cerro Gordo County, Franklin County, Hancock County, Wright County | 459 |
| 50458 | Nora Springs city, Portland CDP | Cerro Gordo County, Floyd County, Mitchell County | 2,349 |
| 50459 | Northwood city | Winnebago County, Worth County | 3,156 |
| 50460 | Orchard city | Floyd County, Mitchell County | 602 |
| 50461 | Mitchell city, New Haven CDP, Osage city | Floyd County, Mitchell County | 5,166 |
| 50464 | Plymouth city | Cerro Gordo County, Mitchell County, Worth County | 588 |
| 50465 | Rake city | Winnebago County | 183 |
| 50466 | Riceville city | Howard County, Mitchell County | 2,108 |
| 50467 | Rock Falls city | Cerro Gordo County | 130 |
| 50468 | Rockford city, Roseville CDP | Cerro Gordo County, Floyd County | 1,405 |
| 50469 | Burchinal CDP, Rockwell city | Cerro Gordo County | 1,479 |
| 50470 | Galt city, Rowan city | Franklin County, Wright County | 223 |
| 50471 | Rudd city | Floyd County, Mitchell County | 711 |
| 50472 | Carpenter city, Mona CDP, Otranto CDP, St. Ansgar city, Toeterville CDP | Mitchell County, Worth County | 2,431 |
| 50473 | Scarville city | Winnebago County | 211 |
| 50475 | Chapin CDP, Sheffield city | Cerro Gordo County, Franklin County | 1,368 |
| 50476 | Stacyville city | Mitchell County | 721 |
| 50477 | Swaledale city | Cerro Gordo County | 243 |
| 50478 | Thompson city | Winnebago County | 709 |
| 50479 | Thornton city | Cerro Gordo County, Franklin County | 697 |
| 50480 | Titonka city | Hancock County, Kossuth County, Winnebago County | 823 |
| 50482 | Ventura city | Cerro Gordo County, Hancock County | 748 |
| 50483 | St. Benedict CDP, Wesley city | Hancock County, Kossuth County | 778 |
| 50484 | Woden city | Hancock County, Kossuth County, Winnebago County | 363 |
| 50501 | Coalville CDP, Fort Dodge city | Webster County | 28,533 |
| 50510 | Albert City city | Buena Vista County, Pocahontas County | 981 |
| 50511 | Algona city, Sexton CDP, St. Benedict CDP | Kossuth County | 7,137 |
| 50514 | Armstrong city | Emmet County, Kossuth County | 1,194 |
| 50515 | Ayrshire city | Clay County, Palo Alto County | 243 |
| 50516 | Badger city | Humboldt County, Webster County | 740 |
| 50517 | Bancroft city | Kossuth County | 940 |
| 50518 | Barnum city | Webster County | 370 |
| 50519 | Bode city, St. Joseph CDP | Humboldt County, Kossuth County | 607 |
| 50520 | Bradgate city | Humboldt County, Pocahontas County | 144 |
| 50521 | | Webster County | 14 |
| 50522 | Burt city | Kossuth County | 998 |
| 50523 | Callender city | Webster County | 566 |
| 50524 | Clare city | Pocahontas County, Webster County | 636 |
| 50525 | Clarion city | Wright County | 3,452 |
| 50527 | Curlew city | Palo Alto County | 127 |
| 50528 | Cylinder city | Palo Alto County | 306 |
| 50529 | Dakota City city | Humboldt County | 929 |
| 50530 | Dayton city | Boone County, Webster County | 1,246 |
| 50531 | Dolliver city | Emmet County, Martin County | 207 |
| 50532 | Duncombe city | Hamilton County, Webster County | 845 |
| 50533 | Eagle Grove city, Goldfield city | Humboldt County, Webster County, Wright County | 4,059 |
| 50535 | Early city | Sac County | 1,135 |
| 50536 | Emmetsburg city | Palo Alto County | 4,410 |
| 50538 | Farnhamville city, Rinard city | Calhoun County, Webster County | 540 |
| 50539 | Fenton city | Kossuth County, Palo Alto County | 427 |
| 50540 | Fonda city, Varina city | Buena Vista County, Calhoun County, Pocahontas County, Sac County | 1,178 |
| 50541 | Bradgate city, Gilmore City city, Pioneer city | Humboldt County, Pocahontas County | 931 |
| 50542 | Goldfield city | Humboldt County, Wright County | 940 |
| 50543 | Farnhamville city, Gowrie city | Greene County, Webster County | 1,260 |
| 50544 | Harcourt city | Webster County | 551 |
| 50545 | Hardy city | Humboldt County | 173 |
| 50546 | Havelock city, Plover city | Palo Alto County, Pocahontas County | 305 |
| 50548 | Dakota City city, Humboldt city | Humboldt County, Webster County | 5,612 |
| 50551 | Jolley city | Calhoun County | 35 |
| 50552 | Knierim city | Calhoun County | 74 |
| 50554 | Laurens city | Buena Vista County, Palo Alto County, Pocahontas County | 1,695 |
| 50556 | Ledyard city | Kossuth County | 150 |
| 50557 | Lehigh city | Webster County | 820 |
| 50558 | Livermore city | Humboldt County, Kossuth County | 706 |
| 50559 | Lone Rock city | Kossuth County | 260 |
| 50560 | Irvington CDP, Lu Verne city | Humboldt County, Kossuth County | 512 |
| 50561 | Lytton city | Calhoun County, Sac County | 591 |
| 50562 | Mallard city | Palo Alto County, Pocahontas County | 353 |
| 50563 | Knierim city, Manson city, Twin Lakes CDP | Calhoun County, Pocahontas County, Webster County | 2,648 |
| 50565 | Marathon city | Buena Vista County, Clay County | 359 |
| 50566 | Moorland city | Calhoun County, Webster County | 437 |
| 50567 | Nemaha city | Sac County | 225 |
| 50568 | Newell city | Buena Vista County, Sac County | 1,579 |
| 50569 | Otho city | Webster County | 710 |
| 50570 | Ottosen city | Humboldt County, Kossuth County | 205 |
| 50571 | Palmer city | Pocahontas County | 253 |
| 50573 | Plover city | Pocahontas County | 88 |
| 50574 | Pocahontas city | Pocahontas County | 2,097 |
| 50575 | Pomeroy city, Twin Lakes CDP | Calhoun County, Pocahontas County | 694 |
| 50576 | Rembrandt city | Buena Vista County | 273 |
| 50577 | Renwick city | Humboldt County, Wright County | 330 |
| 50578 | Ringsted city | Emmet County, Kossuth County, Palo Alto County | 577 |
| 50579 | Rockwell City city, Twin Lakes CDP | Calhoun County | 2,993 |
| 50581 | Plover city, Rolfe city | Palo Alto County, Pocahontas County | 921 |
| 50582 | Rutland city | Humboldt County | 220 |
| 50583 | Sac City city | Calhoun County, Sac County | 2,399 |
| 50585 | Sioux Rapids city | Buena Vista County, Clay County | 1,210 |
| 50586 | Knierim city, Somers city | Calhoun County, Webster County | 328 |
| 50588 | Lakeside city, Storm Lake city, Truesdale city | Buena Vista County, Sac County | 13,258 |
| 50590 | Swea City city | Kossuth County | 933 |
| 50591 | Thor city | Humboldt County, Webster County | 405 |
| 50592 | Truesdale city | Buena Vista County | 162 |
| 50593 | Varina city | Pocahontas County | 27 |
| 50594 | Vincent city | Webster County | 203 |
| 50595 | Webster City city | Hamilton County, Webster County, Wright County | 9,018 |
| 50597 | Rodman city, West Bend city | Humboldt County, Kossuth County, Palo Alto County, Pocahontas County | 1,229 |
| 50598 | Whittemore city | Kossuth County, Palo Alto County | 935 |
| 50599 | Woolstock city | Hamilton County, Wright County | 456 |
| 50601 | Ackley city | Butler County, Franklin County, Grundy County, Hardin County | 2,521 |
| 50602 | Allison city | Butler County | 1,583 |
| 50603 | Alta Vista city | Chickasaw County, Howard County, Mitchell County | 337 |
| 50604 | Aplington city | Butler County, Grundy County | 1,550 |
| 50605 | Aredale city | Butler County, Franklin County | 247 |
| 50606 | Arlington city | Clayton County, Fayette County | 823 |
| 50607 | Aurora city | Buchanan County, Fayette County | 427 |
| 50608 | | Butler County | 43 |
| 50609 | Beaman city | Grundy County, Marshall County, Tama County | 365 |
| 50611 | Bristow city | Butler County | 347 |
| 50612 | | Black Hawk County, Tama County | 338 |
| 50613 | Cedar Falls city, Hudson city, New Hartford city, Waterloo city | Black Hawk County, Butler County, Grundy County | 43,708 |
| 50616 | Charles City city, Colwell city, Floyd city | Chickasaw County, Floyd County | 9,692 |
| 50619 | Clarksville city | Butler County | 2,133 |
| 50620 | Colwell city | Floyd County | 53 |
| 50621 | Conrad city | Grundy County, Marshall County | 1,558 |
| 50622 | Denver city | Bremer County | 3,120 |
| 50623 | | Black Hawk County | 123 |
| 50624 | Dike city | Grundy County | 1,544 |
| 50625 | Dumont city | Butler County, Franklin County | 941 |
| 50626 | Dunkerton city | Black Hawk County, Buchanan County | 1,619 |
| 50627 | Eldora city, Whitten city | Grundy County, Hardin County | 3,285 |
| 50628 | Elma city | Howard County, Mitchell County | 1,176 |
| 50629 | Fairbank city | Black Hawk County, Bremer County, Buchanan County, Fayette County | 2,855 |
| 50630 | Fredericksburg city | Bremer County, Chickasaw County | 1,532 |
| 50631 | Frederika city | Bremer County | 238 |
| 50632 | Garwin city, Green Mountain CDP | Marshall County, Tama County | 1,312 |
| 50633 | Geneva city | Franklin County | 453 |
| 50634 | Gilbertville city | Black Hawk County | 790 |
| 50635 | Gladbrook city, Lincoln city | Marshall County, Tama County | 1,294 |
| 50636 | Greene city | Butler County, Floyd County | 1,985 |
| 50638 | Grundy Center city | Grundy County | 3,444 |
| 50641 | Hazleton city | Buchanan County | 1,020 |
| 50642 | Holland city | Grundy County | 553 |
| 50643 | Hudson city | Black Hawk County, Grundy County | 3,058 |
| 50644 | Independence city, Quasqueton city, Winthrop city | Buchanan County | 8,646 |
| 50645 | Bassett city, Ionia city | Bremer County, Chickasaw County, Floyd County | 1,253 |
| 50647 | Janesville city | Black Hawk County, Bremer County | 2,090 |
| 50648 | Gilbertville city, Jesup city, Raymond city | Black Hawk County, Buchanan County | 4,004 |
| 50649 | | Butler County | 8 |
| 50650 | Lamont city | Buchanan County, Fayette County | 846 |
| 50651 | La Porte City city | Benton County, Black Hawk County, Tama County | 3,532 |
| 50652 | Lincoln city | Tama County | 112 |
| 50653 | Marble Rock city, Roseville CDP | Floyd County | 556 |
| 50654 | Masonville city | Buchanan County, Delaware County | 405 |
| 50655 | Maynard city | Fayette County | 759 |
| 50657 | Morrison city | Grundy County | 106 |
| 50658 | Nashua city | Bremer County, Butler County, Chickasaw County, Floyd County | 2,433 |
| 50659 | New Hampton city, North Washington city | Chickasaw County, Howard County | 5,951 |
| 50660 | New Hartford city | Butler County, Grundy County | 1,216 |
| 50662 | Oelwein city | Buchanan County, Fayette County | 6,685 |
| 50664 | | Fayette County | 127 |
| 50665 | Parkersburg city, Stout city | Butler County, Grundy County | 2,748 |
| 50666 | Plainfield city | Bremer County, Butler County | 724 |
| 50667 | Elk Run Heights city, Raymond city | Black Hawk County | 806 |
| 50668 | Readlyn city | Bremer County | 1,137 |
| 50669 | Morrison city, Reinbeck city | Black Hawk County, Grundy County, Tama County | 2,286 |
| 50670 | Shell Rock city | Black Hawk County, Bremer County, Butler County | 2,440 |
| 50671 | Stanley city | Buchanan County, Fayette County | 208 |
| 50672 | Steamboat Rock city | Grundy County, Hardin County | 469 |
| 50673 | Stout city | Grundy County | 215 |
| 50674 | Frederika city, Sumner city | Bremer County, Chickasaw County, Fayette County | 3,663 |
| 50675 | Traer city | Black Hawk County, Tama County | 2,405 |
| 50676 | Frederika city, Tripoli city | Bremer County | 2,170 |
| 50677 | Janesville city, Waverly city | Bremer County, Butler County | 12,497 |
| 50680 | Wellsburg city | Grundy County, Hardin County | 1,060 |
| 50681 | Westgate city | Fayette County | 422 |
| 50682 | Quasqueton city, Winthrop city | Buchanan County | 1,640 |
| 50701 | Cedar Falls city, Hudson city, Waterloo city | Black Hawk County | 30,194 |
| 50702 | Washburn CDP, Waterloo city | Black Hawk County | 20,270 |
| 50703 | Elk Run Heights city, Evansdale city, Raymond city, Waterloo city | Black Hawk County | 19,270 |
| 50707 | Elk Run Heights city, Evansdale city, Waterloo city | Black Hawk County | 7,597 |
| 50801 | Creston city, Cromwell city | Adair County, Adams County, Union County | 9,135 |
| 50830 | Afton city, Arispe city | Union County | 1,775 |
| 50831 | Arispe city | Union County | 24 |
| 50833 | Bedford city, Conway city | Taylor County | 2,077 |
| 50835 | Benton city, Maloy city | Ringgold County | 70 |
| 50836 | Athelstan CDP, Blockton city, Maloy city | Ringgold County, Taylor County | 356 |
| 50837 | Bridgewater city | Adair County, Adams County, Cass County | 370 |
| 50839 | Carbon city | Adams County | 51 |
| 50840 | Clearfield city | Ringgold County, Taylor County | 594 |
| 50841 | Carbon city, Corning city | Adams County, Montgomery County, Taylor County | 2,447 |
| 50842 | Cromwell city | Union County | 62 |
| 50843 | Cumberland city | Adams County, Cass County | 439 |
| 50845 | Diagonal city | Ringgold County, Union County | 841 |
| 50846 | Fontanelle city | Adair County | 1,061 |
| 50847 | Grant city | Montgomery County | 58 |
| 50848 | Gravity city | Taylor County | 227 |
| 50849 | Greenfield city | Adair County | 2,404 |
| 50851 | Kent CDP, Lenox city | Adams County, Ringgold County, Taylor County, Union County | 2,187 |
| 50853 | Massena city | Adams County, Cass County | 739 |
| 50854 | Mount Ayr city | Ringgold County | 2,357 |
| 50857 | Nodaway city | Adams County, Montgomery County, Taylor County | 165 |
| 50858 | Orient city | Adair County | 756 |
| 50859 | Prescott city | Adair County, Adams County | 696 |
| 50860 | Delphos CDP, Redding city | Ringgold County | 119 |
| 50861 | Arispe city, Shannon City city | Ringgold County, Union County | 280 |
| 50862 | Sharpsburg city | Taylor County | 192 |
| 50863 | Tingley city | Ringgold County | 186 |
| 50864 | Grant city, Villisca city | Adams County, Cass County, Montgomery County, Page County, Taylor County | 1,875 |
| 51001 | Akron city | Plymouth County, Union County | 2,254 |
| 51002 | Alta city | Buena Vista County, Cherokee County | 2,799 |
| 51003 | Alton city, Orange City city | Sioux County | 1,732 |
| 51004 | Anthon city | Woodbury County | 961 |
| 51005 | Aurelia city | Buena Vista County, Cherokee County | 1,481 |
| 51006 | Battle Creek city | Crawford County, Ida County, Woodbury County | 1,173 |
| 51007 | Bronson city | Woodbury County | 557 |
| 51008 | Brunsville city | Plymouth County | 179 |
| 51009 | Calumet city | O'Brien County | 175 |
| 51010 | Castana city | Monona County | 431 |
| 51011 | Chatsworth city | Sioux County | 54 |
| 51012 | Cherokee city | Cherokee County | 6,613 |
| 51014 | Cleghorn city | Cherokee County | 491 |
| 51015 | Climbing Hill CDP | Woodbury County | 69 |
| 51016 | Correctionville city | Ida County, Woodbury County | 1,268 |
| 51018 | Cushing city | Ida County, Woodbury County | 602 |
| 51019 | Danbury city | Crawford County, Ida County, Monona County, Woodbury County | 561 |
| 51020 | Galva city | Buena Vista County, Cherokee County, Ida County, Sac County | 543 |
| 51022 | Granville city | O'Brien County, Plymouth County, Sioux County | 818 |
| 51023 | Chatsworth city, Hawarden city | Sioux County, Union County | 3,264 |
| 51024 | Hinton city, Sioux City city | Plymouth County | 2,170 |
| 51025 | Holstein city | Cherokee County, Ida County | 1,886 |
| 51026 | Climbing Hill CDP, Hornick city | Monona County, Woodbury County | 900 |
| 51027 | Ireton city | Plymouth County, Sioux County | 1,504 |
| 51028 | Kingsley city | Plymouth County, Woodbury County | 2,124 |
| 51029 | Larrabee city | Cherokee County, O'Brien County | 310 |
| 51030 | Lawton city | Woodbury County | 1,640 |
| 51031 | Brunsville city, Craig city, Le Mars city, Oyens city, Struble city | Plymouth County, Sioux County | 12,418 |
| 51033 | Linn Grove city | Buena Vista County, Clay County | 432 |
| 51034 | Mapleton city | Crawford County, Monona County, Woodbury County | 1,678 |
| 51035 | Marcus city | Cherokee County, O'Brien County, Plymouth County | 1,481 |
| 51036 | Maurice city | Sioux County | 748 |
| 51037 | Meriden city | Cherokee County | 273 |
| 51038 | Merrill city | Plymouth County | 1,957 |
| 51039 | Moville city | Woodbury County | 2,755 |
| 51040 | Onawa city, Turin city | Monona County | 3,450 |
| 51041 | Orange City city | Sioux County | 6,988 |
| 51044 | Oto city | Woodbury County | 232 |
| 51045 | Oyens city | Plymouth County | 85 |
| 51046 | Paullina city | Cherokee County, O'Brien County | 1,448 |
| 51047 | Peterson city | Buena Vista County, Cherokee County, Clay County, O'Brien County | 741 |
| 51048 | Pierson city | Cherokee County, Plymouth County, Woodbury County | 509 |
| 51049 | Quimby city | Cherokee County | 545 |
| 51050 | Remsen city | Cherokee County, Plymouth County, Sioux County | 2,872 |
| 51051 | Rodney city | Monona County | 68 |
| 51052 | Salix city | Woodbury County | 1,004 |
| 51053 | Schaller city | Buena Vista County, Ida County, Sac County | 984 |
| 51054 | Sergeant Bluff city, Sioux City city | Woodbury County | 5,416 |
| 51055 | Sloan city | Monona County, Woodbury County | 1,482 |
| 51056 | Smithland city | Monona County, Woodbury County | 349 |
| 51058 | Calumet city, Sutherland city | Cherokee County, Clay County, O'Brien County | 1,058 |
| 51060 | Ute city | Crawford County, Monona County | 526 |
| 51061 | Washta city | Cherokee County, Ida County | 309 |
| 51062 | Westfield city | Plymouth County | 389 |
| 51063 | Whiting city | Monona County | 1,110 |
| 51101 | Sioux City city | Woodbury County | 649 |
| 51103 | Sioux City city | Woodbury County | 17,176 |
| 51104 | Sioux City city | Woodbury County | 23,038 |
| 51105 | Sioux City city | Woodbury County | 10,902 |
| 51106 | Sioux City city | Woodbury County | 27,491 |
| 51108 | Sioux City city | Plymouth County, Woodbury County | 5,431 |
| 51109 | Sioux City city | Plymouth County, Woodbury County | 3,453 |
| 51111 | Sergeant Bluff city, Sioux City city | Woodbury County | 80 |
| 51201 | Matlock city, Sheldon city | Lyon County, O'Brien County, Osceola County, Sioux County | 6,139 |
| 51230 | Alvord city | Lyon County | 530 |
| 51231 | Archer city | O'Brien County | 659 |
| 51232 | Ashton city | Lyon County, O'Brien County, Osceola County | 790 |
| 51234 | Boyden city | Sioux County | 1,215 |
| 51235 | Doon city | Lyon County, Sioux County | 1,126 |
| 51237 | George city | Lyon County | 1,727 |
| 51238 | Hospers city | O'Brien County, Sioux County | 1,383 |
| 51239 | Hull city | Lyon County, Sioux County | 3,198 |
| 51240 | Inwood city | Lyon County, Sioux County | 1,837 |
| 51241 | Larchwood city, Lester city | Lyon County | 2,085 |
| 51242 | Lester city | Lyon County | 306 |
| 51243 | Little Rock city | Lyon County, Osceola County | 659 |
| 51244 | Matlock city | Sioux County | 159 |
| 51245 | Primghar city | O'Brien County | 1,217 |
| 51246 | Lester city, Rock Rapids city | Lyon County | 3,883 |
| 51247 | Rock Valley city | Lyon County, Sioux County | 4,898 |
| 51248 | Sanborn city | O'Brien County, Osceola County | 1,636 |
| 51249 | Sibley city | Osceola County | 3,344 |
| 51250 | Sioux Center city | Sioux County | 9,627 |
| 51301 | Fostoria city, Spencer city | Clay County | 12,326 |
| 51331 | Arnolds Park city, West Okoboji city | Dickinson County | 1,001 |
| 51333 | Dickens city, Gillett Grove city | Clay County | 418 |
| 51334 | Estherville city, Gruver city, Superior city | Dickinson County, Emmet County | 7,038 |
| 51338 | Everly city | Clay County, Dickinson County | 906 |
| 51340 | Fostoria city | Clay County | 89 |
| 51341 | Gillett Grove city | Clay County | 39 |
| 51342 | Graettinger city | Emmet County, Palo Alto County | 1,392 |
| 51343 | Greenville city | Clay County | 263 |
| 51345 | Harris city | Dickinson County, Osceola County | 460 |
| 51346 | Hartley city | Clay County, O'Brien County, Osceola County | 2,124 |
| 51347 | Lake Park city | Dickinson County | 1,587 |
| 51350 | Melvin city | O'Brien County, Osceola County | 417 |
| 51351 | Arnolds Park city, Milford city, Wahpeton city, West Okoboji city | Dickinson County | 4,823 |
| 51354 | Ocheyedan city | Osceola County | 1,150 |
| 51355 | Arnolds Park city, Okoboji city, Spirit Lake city | Dickinson County | 905 |
| 51357 | Rossie city, Royal city | Clay County | 751 |
| 51358 | Ruthven city | Clay County, Palo Alto County | 1,342 |
| 51360 | Orleans city, Spirit Lake city, Wahpeton city | Dickinson County, Jackson County | 8,271 |
| 51363 | Superior city | Dickinson County | 188 |
| 51364 | Terril city | Clay County, Dickinson County, Emmet County | 775 |
| 51365 | Wallingford city | Emmet County | 462 |
| 51366 | Gillett Grove city, Webb city | Buena Vista County, Clay County | 323 |
| 51401 | Carroll city, Halbur city, Lidderdale city, Willey city | Carroll County | 12,275 |
| 51430 | Arcadia city | Carroll County | 1,399 |
| 51431 | Arthur city | Ida County, Sac County | 467 |
| 51432 | Aspinwall city | Crawford County | 26 |
| 51433 | Auburn city, Yetter city | Calhoun County, Carroll County, Sac County | 606 |
| 51436 | Breda city | Carroll County, Crawford County, Sac County | 866 |
| 51439 | Charter Oak city, Ricketts city | Crawford County | 840 |
| 51440 | Dedham city | Carroll County | 283 |
| 51441 | Deloit city | Crawford County | 433 |
| 51442 | Denison city | Crawford County | 9,373 |
| 51443 | Glidden city, Lanesboro city, Lidderdale city, Ralston city | Carroll County, Greene County | 1,329 |
| 51444 | Halbur city | Carroll County | 356 |
| 51445 | Ida Grove city | Ida County | 2,661 |
| 51446 | Irwin city | Shelby County | 554 |
| 51447 | Kirkman city | Shelby County | 222 |
| 51448 | Kiron city | Crawford County, Ida County, Sac County | 607 |
| 51449 | Lake City city | Calhoun County, Carroll County | 1,996 |
| 51450 | Lake View city | Sac County | 1,536 |
| 51451 | Lanesboro city | Carroll County | 72 |
| 51452 | Lidderdale city | Carroll County | 171 |
| 51453 | Lanesboro city, Lohrville city, Rinard city | Calhoun County, Carroll County, Greene County | 503 |
| 51454 | Manilla city | Crawford County, Shelby County | 1,373 |
| 51455 | Aspinwall city, Gray city, Manning city | Audubon County, Carroll County, Crawford County, Shelby County | 2,259 |
| 51458 | Odebolt city | Crawford County, Sac County | 1,194 |
| 51459 | Ralston city | Carroll County | 81 |
| 51460 | Ricketts city | Crawford County | 99 |
| 51461 | Schleswig city | Crawford County, Ida County | 1,256 |
| 51462 | Ralston city, Scranton city | Carroll County, Greene County | 987 |
| 51463 | Templeton city | Carroll County | 453 |
| 51465 | Vail city | Crawford County | 844 |
| 51466 | Wall Lake city | Carroll County, Crawford County, Sac County | 1,214 |
| 51467 | Westside city | Carroll County, Crawford County | 531 |
| 51501 | Council Bluffs city | Pottawattamie County | 35,051 |
| 51503 | Council Bluffs city | Mills County, Pottawattamie County | 37,408 |
| 51510 | Carter Lake city | Pottawattamie County | 3,796 |
| 51520 | Arion city | Crawford County | 225 |
| 51521 | Avoca city | Pottawattamie County, Shelby County | 1,741 |
| 51523 | Blencoe city | Harrison County, Monona County | 402 |
| 51525 | Carson city | Pottawattamie County | 1,082 |
| 51526 | Crescent city | Pottawattamie County | 1,749 |
| 51527 | Defiance city | Crawford County, Shelby County | 618 |
| 51528 | Arion city, Buck Grove city, Dow City city | Crawford County, Shelby County | 681 |
| 51529 | Dunlap city | Crawford County, Harrison County, Monona County, Shelby County | 1,789 |
| 51530 | Earling city, Westphalia city | Shelby County | 529 |
| 51531 | Elk Horn city | Audubon County, Shelby County | 706 |
| 51532 | Elliott city, Grant city | Cass County, Montgomery County, Pottawattamie County | 699 |
| 51533 | Emerson city | Mills County, Montgomery County | 964 |
| 51534 | Glenwood city | Mills County | 9,246 |
| 51535 | Griswold city | Cass County, Pottawattamie County | 1,721 |
| 51536 | Hancock city | Pottawattamie County | 389 |
| 51537 | Corley CDP, Harlan city, Jacksonville CDP, Tennant city, Westphalia city | Shelby County | 6,738 |
| 51540 | Hastings city | Mills County | 306 |
| 51541 | Henderson city | Mills County, Montgomery County, Pottawattamie County | 440 |
| 51542 | Crescent city | Pottawattamie County | 985 |
| 51543 | Kimballton city | Audubon County, Shelby County | 410 |
| 51544 | Lewis city | Cass County, Pottawattamie County | 681 |
| 51545 | Little Sioux city, River Sioux CDP | Harrison County, Monona County | 296 |
| 51546 | Logan city, Magnolia city | Harrison County | 3,239 |
| 51548 | McClelland city | Pottawattamie County | 503 |
| 51549 | Macedonia city | Pottawattamie County | 593 |
| 51550 | Magnolia city | Harrison County | 123 |
| 51551 | Malvern city | Mills County | 1,648 |
| 51552 | Marne city | Cass County, Shelby County | 271 |
| 51553 | Minden city | Pottawattamie County | 1,119 |
| 51554 | Mineola CDP | Mills County | 168 |
| 51555 | California Junction CDP, Loveland CDP, Missouri Valley city | Harrison County, Pottawattamie County | 4,697 |
| 51556 | Modale city | Harrison County | 417 |
| 51558 | Moorhead city | Harrison County, Monona County | 651 |
| 51559 | Bentley CDP, Neola city | Harrison County, Pottawattamie County | 2,037 |
| 51560 | Hancock city, Oakland city | Pottawattamie County | 2,135 |
| 51561 | Pacific Junction city | Mills County | 1,007 |
| 51562 | Panama city | Shelby County | 532 |
| 51563 | Persia city | Harrison County, Shelby County | 726 |
| 51564 | Pisgah city | Harrison County | 457 |
| 51565 | Portsmouth city | Harrison County, Shelby County | 525 |
| 51566 | Coburg city, Red Oak city | Montgomery County, Page County, Pottawattamie County | 6,707 |
| 51570 | Shelby city, Tennant city | Harrison County, Pottawattamie County, Shelby County | 931 |
| 51571 | Silver City city | Mills County, Pottawattamie County | 699 |
| 51572 | Soldier city | Monona County | 478 |
| 51573 | Stanton city | Montgomery County | 1,097 |
| 51575 | Treynor city | Pottawattamie County | 1,485 |
| 51576 | Bentley CDP, McClelland city, Underwood city, Weston CDP | Pottawattamie County | 2,036 |
| 51577 | Walnut city | Cass County, Pottawattamie County, Shelby County | 932 |
| 51578 | Westphalia city | Shelby County | 163 |
| 51579 | Woodbine city | Harrison County | 2,304 |
| 51601 | Shenandoah city | Fremont County, Page County | 5,451 |
| 51631 | Braddyville city | Page County | 333 |
| 51632 | Clarinda city, Hepburn city, Shambaugh city, Yorktown city | Page County, Taylor County | 6,890 |
| 51636 | Coin city | Page County | 482 |
| 51637 | College Springs city | Page County | 247 |
| 51638 | Essex city | Montgomery County, Page County | 1,246 |
| 51639 | Farragut city | Fremont County | 737 |
| 51645 | Imogene city | Fremont County, Mills County, Montgomery County, Page County | 266 |
| 51646 | New Market city | Taylor County | 894 |
| 51647 | Northboro city | Fremont County, Page County | 180 |
| 51648 | Percival CDP | Fremont County | 268 |
| 51649 | Randolph city | Fremont County, Mills County | 379 |
| 51650 | Riverton city | Fremont County | 263 |
| 51651 | Shambaugh city | Page County | 135 |
| 51652 | Anderson CDP, Sidney city | Fremont County | 1,496 |
| 51653 | Tabor city | Fremont County, Mills County | 1,423 |
| 51654 | Bartlett CDP, Thurman city | Fremont County | 397 |
| 51656 | Yorktown city | Page County | 38 |
| 52001 | Dubuque city, Sageville city | Dubuque County | 43,623 |
| 52002 | Asbury city, Dubuque city, Sageville city | Dubuque County | 17,420 |
| 52003 | Dubuque city | Dubuque County | 13,855 |
| 52030 | Andrew city | Jackson County | 398 |
| 52031 | Bellevue city, Springbrook city, St. Donatus city | Dubuque County, Jackson County | 5,007 |
| 52032 | Bernard city | Dubuque County, Jackson County, Jones County | 1,437 |
| 52033 | Cascade city | Dubuque County, Jones County | 3,314 |
| 52035 | Colesburg city, Osterdock city | Clayton County, Delaware County | 1,078 |
| 52036 | Delaware city | Delaware County | 125 |
| 52037 | Delmar city, Maquoketa city, Welton city | Clinton County, Jackson County | 915 |
| 52038 | Dundee city | Delaware County | 558 |
| 52039 | Asbury city, Durango city, Graf city, Rickardsville city | Dubuque County | 849 |
| 52040 | Dyersville city, Farley city | Delaware County, Dubuque County | 5,560 |
| 52041 | Dyersville city, Earlville city | Delaware County | 2,163 |
| 52042 | Edgewood city, Elkport city | Clayton County, Delaware County | 1,662 |
| 52043 | Elkader city | Clayton County | 1,780 |
| 52044 | Elkport city | Clayton County | 265 |
| 52045 | Bankston city, Epworth city | Dubuque County | 2,748 |
| 52046 | Farley city | Dubuque County | 2,624 |
| 52047 | Farmersburg city, St. Olaf city | Clayton County | 805 |
| 52048 | Elkport city, Garber city | Clayton County | 334 |
| 52049 | Clayton city, Garnavillo city | Clayton County | 1,106 |
| 52050 | Greeley city | Clayton County, Delaware County | 513 |
| 52052 | Guttenberg city, Luxemburg city, Osterdock city | Clayton County, Dubuque County | 2,846 |
| 52053 | Holy Cross city, North Buena Vista city | Clayton County, Dubuque County | 1,222 |
| 52054 | La Motte city, St. Donatus city | Dubuque County, Jackson County | 906 |
| 52056 | Luxemburg city | Dubuque County | 223 |
| 52057 | Delaware city, Manchester city | Delaware County | 8,006 |
| 52060 | Maquoketa city | Clinton County, Jackson County | 8,018 |
| 52064 | Miles city | Clinton County, Jackson County | 865 |
| 52065 | Luxemburg city, New Vienna city | Delaware County, Dubuque County | 819 |
| 52066 | North Buena Vista city | Clayton County | 99 |
| 52068 | Centralia city, Dubuque city, Peosta city | Dubuque County | 4,701 |
| 52069 | Preston city, Spragueville city | Clinton County, Jackson County | 1,613 |
| 52070 | Sabula city | Clinton County, Jackson County | 1,153 |
| 52071 | St. Donatus city | Jackson County | 116 |
| 52072 | St. Olaf city | Clayton County | 961 |
| 52073 | Balltown city, North Buena Vista city, Sherrill city | Clayton County, Dubuque County | 1,517 |
| 52074 | Spragueville city | Jackson County | 356 |
| 52075 | Springbrook city | Jackson County | 153 |
| 52076 | Strawberry Point city | Clayton County, Delaware County, Fayette County | 2,140 |
| 52077 | Volga city | Clayton County | 296 |
| 52078 | Dyersville city, Worthington city | Delaware County, Dubuque County | 649 |
| 52079 | Zwingle city | Dubuque County, Jackson County | 753 |
| 52101 | Burr Oak CDP, Decorah city | Allamakee County, Winneshiek County | 13,120 |
| 52132 | Calmar city, Spillville city | Howard County, Winneshiek County | 1,824 |
| 52133 | Castalia city | Fayette County, Winneshiek County | 605 |
| 52134 | Chester city | Howard County | 309 |
| 52135 | Clermont city | Clayton County, Fayette County | 636 |
| 52136 | Cresco city | Howard County, Winneshiek County | 5,765 |
| 52140 | | Allamakee County, Winneshiek County | 446 |
| 52141 | Elgin city | Clayton County, Fayette County | 1,288 |
| 52142 | Fayette city | Fayette County | 1,665 |
| 52144 | Fort Atkinson city, Jackson Junction city | Chickasaw County, Fayette County, Winneshiek County | 922 |
| 52146 | Harpers Ferry city | Allamakee County | 801 |
| 52147 | Hawkeye city | Fayette County | 997 |
| 52151 | Lansing city | Allamakee County | 1,816 |
| 52154 | Lawler city | Chickasaw County, Howard County | 837 |
| 52155 | Lime Springs city | Howard County | 1,434 |
| 52156 | Luana city | Allamakee County, Clayton County | 674 |
| 52157 | Marquette city, McGregor city | Clayton County | 1,706 |
| 52158 | Marquette city | Clayton County | 289 |
| 52159 | Monona city | Allamakee County, Clayton County | 2,342 |
| 52160 | New Albin city | Allamakee County | 957 |
| 52161 | Ossian city | Fayette County, Winneshiek County | 1,399 |
| 52162 | Postville city | Allamakee County, Clayton County, Fayette County, Winneshiek County | 3,455 |
| 52163 | Protivin city | Howard County | 356 |
| 52164 | Randalia city | Fayette County | 287 |
| 52165 | Ridgeway city | Winneshiek County | 1,065 |
| 52166 | St. Lucas city | Fayette County | 128 |
| 52168 | Spillville city | Winneshiek County | 371 |
| 52169 | Wadena city | Clayton County, Fayette County | 362 |
| 52170 | Waterville city | Allamakee County | 523 |
| 52171 | Jackson Junction city, Protivin city, St. Lucas city, Waucoma city | Chickasaw County, Fayette County, Winneshiek County | 1,021 |
| 52172 | Waukon city | Allamakee County, Winneshiek County | 6,168 |
| 52175 | West Union city | Fayette County | 3,522 |
| 52201 | Ainsworth city | Washington County | 1,494 |
| 52202 | Alburnett city | Linn County | 1,125 |
| 52203 | Amana CDP, East Amana CDP, High Amana CDP, Middle Amana CDP, South Amana CDP, West Amana CDP | Iowa County, Johnson County, Linn County | 2,478 |
| 52205 | Anamosa city, Morley city, Stone City CDP | Jones County, Linn County | 8,427 |
| 52206 | Atkins city | Benton County | 2,778 |
| 52207 | Baldwin city | Clinton County, Jackson County | 321 |
| 52208 | Belle Plaine city | Benton County, Iowa County, Poweshiek County, Tama County | 3,015 |
| 52209 | Blairstown city | Benton County, Iowa County | 1,025 |
| 52210 | Brandon city | Benton County, Buchanan County | 889 |
| 52211 | Brooklyn city, Holiday Lake CDP | Poweshiek County | 2,566 |
| 52212 | Center Junction CDP | Jones County | 379 |
| 52213 | Center Point city, Urbana city | Benton County, Linn County | 3,955 |
| 52214 | Central City city | Linn County | 3,093 |
| 52215 | Chelsea city, Vining city | Poweshiek County, Tama County | 962 |
| 52216 | Clarence city | Cedar County, Jones County | 1,362 |
| 52217 | Clutier city | Tama County | 552 |
| 52218 | Coggon city | Buchanan County, Delaware County, Linn County | 1,657 |
| 52219 | Prairieburg city | Linn County | 160 |
| 52220 | Conroy CDP | Iowa County | 158 |
| 52221 | Guernsey city | Iowa County, Poweshiek County | 247 |
| 52222 | Deep River city | Iowa County, Poweshiek County | 686 |
| 52223 | Delaware city, Delhi city | Delaware County | 1,014 |
| 52224 | Dysart city | Benton County, Tama County | 2,026 |
| 52225 | Elberon city, Vining city | Benton County, Tama County | 428 |
| 52227 | Cedar Rapids city, Ely city | Johnson County, Linn County | 2,881 |
| 52228 | Cedar Rapids city, Fairfax city, Walford city | Benton County, Johnson County, Linn County | 3,637 |
| 52229 | Garrison city | Benton County | 893 |
| 52231 | Harper city | Keokuk County | 373 |
| 52232 | Hartwick city | Iowa County, Poweshiek County | 323 |
| 52233 | Cedar Rapids city, Hiawatha city, Robins city | Linn County | 7,024 |
| 52235 | Hills city | Johnson County | 821 |
| 52236 | Homestead CDP | Iowa County | 457 |
| 52237 | Hopkinton city | Delaware County, Dubuque County, Jones County | 1,570 |
| 52240 | Coralville city, Hills city, Iowa City city, Tiffin city | Johnson County | 36,370 |
| 52241 | Coralville city, Iowa City city | Johnson County | 22,226 |
| 52242 | Iowa City city | Johnson County | 3,836 |
| 52245 | Iowa City city | Johnson County | 22,179 |
| 52246 | Coralville city, Iowa City city, University Heights city | Johnson County | 22,411 |
| 52247 | Frytown CDP, Kalona city | Johnson County, Washington County | 4,806 |
| 52248 | Keota city, Kinross city | Keokuk County, Washington County | 1,499 |
| 52249 | Keystone city | Benton County | 906 |
| 52251 | Ladora city | Iowa County | 721 |
| 52252 | | Jones County | 117 |
| 52253 | Lisbon city, Mount Vernon city | Cedar County, Johnson County, Jones County, Linn County | 2,816 |
| 52254 | Lost Nation city | Clinton County | 926 |
| 52255 | Clarence city, Lowden city | Cedar County | 1,276 |
| 52257 | Luzerne city | Benton County | 210 |
| 52301 | Conroy CDP, Marengo city | Benton County, Iowa County | 3,856 |
| 52302 | Cedar Rapids city, Marion city, Robins city | Linn County | 42,386 |
| 52305 | Martelle city | Jones County, Linn County | 842 |
| 52306 | Mechanicsville city | Cedar County, Jones County | 1,334 |
| 52307 | Middle Amana CDP | Iowa County | 119 |
| 52308 | Millersburg city | Iowa County | 162 |
| 52309 | Monmouth city | Jackson County, Jones County | 542 |
| 52310 | Monticello city | Delaware County, Jones County, Linn County | 6,184 |
| 52312 | Morley city | Jones County | 60 |
| 52313 | Mount Auburn city | Benton County | 344 |
| 52314 | Lisbon city, Mount Vernon city | Linn County | 5,995 |
| 52315 | Newhall city | Benton County | 1,331 |
| 52316 | Millersburg city, North English city | Iowa County, Keokuk County | 1,519 |
| 52317 | Coralville city, North Liberty city | Johnson County | 21,848 |
| 52318 | Norway city, Walford city | Benton County, Iowa County | 1,015 |
| 52320 | Olin city | Cedar County, Jones County | 1,279 |
| 52321 | Onslow city | Jones County | 488 |
| 52322 | Oxford city, Tiffin city | Iowa County, Johnson County | 1,966 |
| 52323 | Oxford Junction city | Cedar County, Clinton County, Jones County | 1,121 |
| 52324 | Cedar Rapids city, Palo city | Benton County, Linn County | 2,030 |
| 52325 | Parnell city | Iowa County, Johnson County | 529 |
| 52326 | Quasqueton city | Buchanan County | 781 |
| 52327 | Hills city, Riverside city | Johnson County, Louisa County, Washington County | 3,498 |
| 52328 | Cedar Rapids city, Hiawatha city, Robins city | Linn County | 2,816 |
| 52329 | Quasqueton city, Rowley city | Buchanan County | 733 |
| 52330 | Ryan city | Delaware County | 892 |
| 52332 | Shellsburg city | Benton County, Linn County | 1,695 |
| 52333 | Solon city | Cedar County, Johnson County, Linn County | 7,249 |
| 52334 | South Amana CDP | Iowa County | 211 |
| 52335 | Kinross city, North English city, South English city | Iowa County, Keokuk County | 697 |
| 52336 | Springville city | Jones County, Linn County | 2,576 |
| 52337 | Stanwood city | Cedar County | 862 |
| 52338 | Cedar Rapids city, Shueyville city, Swisher city | Johnson County, Linn County | 3,877 |
| 52339 | Tama city | Poweshiek County, Tama County | 4,189 |
| 52340 | Coralville city, North Liberty city, Tiffin city | Johnson County | 4,695 |
| 52341 | Hiawatha city, Robins city | Linn County | 1,180 |
| 52342 | Toledo city | Tama County | 2,915 |
| 52344 | | Linn County | 42 |
| 52345 | Urbana city | Benton County | 1,489 |
| 52346 | Van Horne city | Benton County | 1,018 |
| 52347 | Victor city | Iowa County, Poweshiek County | 1,352 |
| 52348 | Vining city | Tama County | 78 |
| 52349 | Vinton city | Benton County | 7,754 |
| 52351 | Walford city | Benton County, Linn County | 1,498 |
| 52352 | Walker city | Benton County, Buchanan County, Linn County | 1,933 |
| 52353 | Washington city | Washington County | 9,208 |
| 52354 | Watkins CDP | Benton County | 268 |
| 52355 | Webster city | Iowa County, Keokuk County | 238 |
| 52356 | Wellman city | Iowa County, Johnson County, Keokuk County, Washington County | 2,807 |
| 52358 | Downey CDP, West Branch city | Cedar County, Johnson County | 3,926 |
| 52359 | West Chester city | Washington County | 294 |
| 52361 | Conroy CDP, Williamsburg city | Iowa County | 4,686 |
| 52362 | Wyoming city | Jones County | 896 |
| 52401 | Cedar Rapids city | Linn County | 2,130 |
| 52402 | Cedar Rapids city, Hiawatha city, Marion city, Robins city | Linn County | 42,649 |
| 52403 | Bertram city, Cedar Rapids city, Marion city | Linn County | 24,789 |
| 52404 | Cedar Rapids city, Fairfax city, Shueyville city | Johnson County, Linn County | 40,474 |
| 52405 | Cedar Rapids city | Linn County | 26,307 |
| 52411 | Cedar Rapids city, Hiawatha city, Robins city | Linn County | 8,298 |
| 52501 | Chillicothe city, Ottumwa city | Keokuk County, Mahaska County, Wapello County | 30,470 |
| 52530 | Agency city | Wapello County | 1,025 |
| 52531 | Albia city, Melrose city | Monroe County, Wapello County | 5,754 |
| 52533 | Batavia city | Jefferson County, Wapello County | 1,075 |
| 52534 | Beacon city | Mahaska County | 503 |
| 52535 | Birmingham city | Jefferson County, Van Buren County | 802 |
| 52536 | Blakesburg city | Davis County, Monroe County, Wapello County | 817 |
| 52537 | Bloomfield city, Floris city | Davis County, Wapello County | 6,642 |
| 52540 | Brighton city, Coppock city, Pleasant Plain city | Jefferson County, Washington County | 1,185 |
| 52543 | | Mahaska County | 397 |
| 52544 | Centerville city, Numa city, Rathbun city | Appanoose County | 7,685 |
| 52548 | Chillicothe city | Wapello County | 103 |
| 52549 | Cincinnati city | Appanoose County | 691 |
| 52550 | Delta city | Keokuk County, Mahaska County | 699 |
| 52551 | Douds CDP, Leando CDP | Davis County, Van Buren County | 597 |
| 52552 | Drakesville city | Davis County, Wapello County | 1,105 |
| 52553 | Chillicothe city, Eddyville city | Mahaska County, Monroe County, Wapello County | 1,678 |
| 52554 | Eldon city | Davis County, Jefferson County, Van Buren County, Wapello County | 1,092 |
| 52555 | Exline city | Appanoose County | 190 |
| 52556 | Fairfield city, Maharishi Vedic City city | Jefferson County | 11,862 |
| 52557 | Fairfield city | Jefferson County | 432 |
| 52560 | Floris city | Davis County | 164 |
| 52561 | Fremont city | Keokuk County, Mahaska County | 965 |
| 52562 | Hayesville city | Keokuk County | 62 |
| 52563 | Hedrick city, Martinsburg city | Jefferson County, Keokuk County, Wapello County | 1,636 |
| 52565 | Keosauqua city | Van Buren County | 1,870 |
| 52566 | Kirkville city | Wapello County | 250 |
| 52567 | Libertyville city | Jefferson County, Van Buren County | 505 |
| 52568 | Martinsburg city | Keokuk County | 83 |
| 52569 | Melrose city | Appanoose County, Lucas County, Monroe County, Wayne County | 652 |
| 52570 | Milton city | Davis County, Van Buren County | 1,028 |
| 52571 | Moravia city | Appanoose County, Monroe County | 1,313 |
| 52572 | Moulton city | Appanoose County, Davis County | 1,223 |
| 52574 | Mystic city | Appanoose County | 539 |
| 52576 | Ollie city | Jefferson County, Keokuk County | 466 |
| 52577 | Beacon city, Eddyville city, Keomah Village city, Oskaloosa city, University Park city | Mahaska County | 14,551 |
| 52580 | Packwood city | Jefferson County, Keokuk County | 799 |
| 52581 | Plano city | Appanoose County, Wayne County | 281 |
| 52583 | Promise City city | Wayne County | 364 |
| 52584 | Pulaski city | Davis County | 900 |
| 52585 | Richland city | Jefferson County, Keokuk County, Washington County | 813 |
| 52586 | Rose Hill city | Keokuk County, Mahaska County | 564 |
| 52588 | | Davis County, Jefferson County, Van Buren County | 26 |
| 52590 | Seymour city | Appanoose County, Wayne County | 1,325 |
| 52591 | Hayesville city, Sigourney city | Keokuk County | 2,753 |
| 52593 | Udell city | Appanoose County | 177 |
| 52594 | Unionville city | Appanoose County, Davis County | 579 |
| 52595 | University Park city | Mahaska County | 492 |
| 52601 | Augusta CDP, Beaverdale CDP, Burlington city, Oak Hills CDP, West Burlington city | Des Moines County | 27,804 |
| 52619 | Argyle CDP | Lee County | 660 |
| 52620 | Bonaparte city | Van Buren County | 895 |
| 52621 | Crawfordsville city | Louisa County, Washington County | 835 |
| 52623 | Danville city | Des Moines County, Henry County | 2,011 |
| 52624 | Denmark CDP | Lee County | 601 |
| 52625 | Donnellson city, Franklin city, Houghton city | Lee County | 2,355 |
| 52627 | Denmark CDP, Fort Madison city | Lee County | 12,471 |
| 52630 | Hillsboro city | Henry County, Lee County, Van Buren County | 302 |
| 52631 | Houghton city | Lee County | 63 |
| 52632 | Keokuk city, Montrose city, Mooar CDP, Sandusky CDP | Lee County | 12,162 |
| 52635 | Lockridge city | Henry County, Jefferson County | 827 |
| 52637 | Kingston CDP, Mediapolis city | Des Moines County | 2,900 |
| 52638 | Augusta CDP, Middletown city | Des Moines County | 528 |
| 52639 | Fort Madison city, Montrose city | Lee County | 1,732 |
| 52640 | Morning Sun city | Des Moines County, Louisa County | 1,466 |
| 52641 | Mount Pleasant city, Rome city, Swedesburg CDP, Trenton CDP, Westwood city | Henry County, Jefferson County, Van Buren County, Washington County | 12,388 |
| 52644 | Mount Union CDP | Des Moines County, Henry County | 373 |
| 52645 | Lowell CDP, New London city | Des Moines County, Henry County | 3,926 |
| 52646 | Oakville city | Des Moines County, Louisa County | 320 |
| 52647 | Olds city | Henry County | 167 |
| 52649 | Salem city | Henry County, Lee County, Van Buren County | 903 |
| 52650 | Sperry CDP | Des Moines County | 683 |
| 52651 | Stockport city | Jefferson County, Van Buren County | 515 |
| 52652 | Swedesburg CDP | Henry County | 75 |
| 52653 | Wapello city | Louisa County | 3,202 |
| 52654 | Coppock city, Wayland city | Henry County, Jefferson County, Washington County | 1,805 |
| 52655 | Beaverdale CDP, Burlington city, West Burlington city | Des Moines County | 4,279 |
| 52656 | Denmark CDP, Franklin city, St. Paul city, West Point city | Henry County, Lee County | 2,252 |
| 52657 | St. Paul city | Lee County | 57 |
| 52658 | Augusta CDP, Denmark CDP, Fort Madison city, Wever CDP | Des Moines County, Lee County | 1,015 |
| 52659 | Olds city, Winfield city | Henry County, Louisa County | 1,311 |
| 52660 | Yarmouth CDP | Des Moines County | 301 |
| 52701 | Andover city | Clinton County | 122 |
| 52720 | Atalissa city | Cedar County, Muscatine County | 868 |
| 52721 | Bennett city | Cedar County | 972 |
| 52722 | Bettendorf city, Le Claire city, Panorama Park city, Riverdale city | Scott County | 40,097 |
| 52726 | Blue Grass city, Buffalo city, Montpelier CDP | Muscatine County, Scott County | 5,189 |
| 52727 | | Clinton County | 287 |
| 52728 | Buffalo city | Scott County | 862 |
| 52729 | Calamus city | Clinton County, Scott County | 901 |
| 52730 | Camanche city, Clinton city, Low Moor city | Clinton County | 5,152 |
| 52731 | Charlotte city | Clinton County, Jackson County | 697 |
| 52732 | Camanche city, Clinton city | Clinton County | 26,077 |
| 52737 | Columbus City city | Louisa County | 251 |
| 52738 | Columbus City city, Columbus Junction city, Cotter city, Fredonia city | Louisa County, Washington County | 3,482 |
| 52739 | Conesville city | Louisa County, Muscatine County | 760 |
| 52742 | DeWitt city, Welton city | Clinton County | 7,621 |
| 52745 | Big Rock CDP, Dixon city | Scott County | 389 |
| 52746 | Donahue city | Scott County | 1,138 |
| 52747 | Durant city | Cedar County, Muscatine County, Scott County | 1,941 |
| 52748 | Eldridge city, Park View CDP | Scott County | 9,567 |
| 52749 | Fruitland city | Muscatine County | 1,232 |
| 52750 | Goose Lake city | Clinton County | 477 |
| 52751 | Grand Mound city | Clinton County | 1,022 |
| 52752 | Grandview city | Louisa County | 394 |
| 52753 | Argo CDP, Bettendorf city, Le Claire city, Princeton city | Scott County | 6,019 |
| 52754 | Grandview city, Letts city | Louisa County, Muscatine County | 1,400 |
| 52755 | Lone Tree city | Johnson County, Louisa County | 2,167 |
| 52756 | Long Grove city, McCausland city, Park View CDP | Scott County | 2,000 |
| 52757 | Low Moor city | Clinton County | 229 |
| 52758 | McCausland city | Scott County | 322 |
| 52759 | Montpelier CDP | Muscatine County | 92 |
| 52760 | Moscow CDP | Cedar County, Muscatine County | 467 |
| 52761 | Fairport CDP, Fruitland city, Kent Estates CDP, Montpelier CDP, Muscatine city | Louisa County, Muscatine County, Rock Island County | 30,515 |
| 52765 | New Liberty city | Cedar County, Scott County | 324 |
| 52766 | Nichols city | Johnson County, Muscatine County | 753 |
| 52767 | Bettendorf city | Scott County | 305 |
| 52768 | Princeton city | Scott County | 1,418 |
| 52769 | Stockton city | Muscatine County, Scott County | 580 |
| 52771 | | Clinton County | 55 |
| 52772 | Rochester CDP, Tipton city | Cedar County | 5,453 |
| 52773 | Maysville city, Plainview CDP, Walcott city | Muscatine County, Scott County | 2,895 |
| 52774 | Welton city | Clinton County | 141 |
| 52776 | West Liberty city | Cedar County, Johnson County, Muscatine County | 5,038 |
| 52777 | Big Rock CDP, Toronto city, Wheatland city | Cedar County, Clinton County | 1,337 |
| 52778 | Durant city, Wilton city | Cedar County, Muscatine County | 3,799 |
| 52801 | Davenport city | Scott County | 1,381 |
| 52802 | Buffalo city, Davenport city | Scott County | 10,130 |
| 52803 | Bettendorf city, Davenport city | Scott County | 21,877 |
| 52804 | Buffalo city, Davenport city | Scott County | 27,497 |
| 52806 | Davenport city | Scott County | 27,814 |
| 52807 | Davenport city, Eldridge city | Scott County | 15,329 |
| 56129 | Ellsworth city | Lyon County, Nobles County, Rock County | 834 |