Idaho

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Idaho counties by population

Number of counties: 44
Population: 1,811,617
Largest county: Ada County
Table of counties in Idaho sorted by population from largest to smallest.
CountyPopulation
Ada County485,246
Canyon County227,367
Kootenai County168,317
Bonneville County121,771
Twin Falls County89,128
Bannock County86,362
Madison County50,979
Bingham County47,540
Bonner County46,481
Nez Perce County41,820
Latah County39,464
Jefferson County30,427
Elmore County28,396
Payette County24,928
Cassia County24,469
Jerome County24,081
Blaine County23,868
Minidoka County21,393
Gem County18,692
Idaho County16,494
Gooding County15,422
Franklin County14,036
Fremont County13,370
Shoshone County13,124
Boundary County11,966
Owyhee County11,815
Teton County11,490
Valley County11,476
Washington County10,425
Benewah County9,509
Clearwater County8,719
Lemhi County7,948
Power County7,854
Boise County7,549
Caribou County7,003
Bear Lake County6,327
Lincoln County5,184
Oneida County4,514
Adams County4,321
Custer County4,273
Lewis County3,613
Butte County2,573
Camas County1,044
Clark County839

What is the largest county in Idaho?

Ada County is the largest county in Idaho with a population of 485,246.

TOP-5 counties by population in Idaho:
  • Ada County
  • Canyon County
  • Kootenai County
  • Bonneville County
  • Twin Falls County