Jefferson County, Kansas demographics
Population: 18,391
Median age: 43.7
Median household income: 72,270
Demographics, population, home values, social and economic characteristics of Jefferson County, Kansas.
Population
| 2021 | 18,391 |
| 2020 | 18,974 |
| 2019 | 18,890 |
| 2018 | 18,888 |
| 2017 | 18,856 |
| 2016 | 18,880 |
| 2015 | 18,898 |
| 2014 | 18,932 |
| 2013 | 18,971 |
| 2012 | 19,036 |
| 2011 | 19,046 |
| 2010 | 19,059 |
| 2009 | 18,380 |
Jefferson County, KS cities
Grantville CDP - 256
McLouth city - 1,063
Meriden city - 669
Nortonville city - 744
Oskaloosa city - 1,000
Ozawkie city - 566
Perry city - 1,266
Valley Falls city - 1,173
Winchester city - 420
Census data for Jefferson County, Kansas
Demographic and housing estimates in Jefferson County, Kansas
| Total population | 18,391 |
| Male | 9,265 |
| Female | 9,126 |
| Total population | 18,391 |
| Under 5 years | 954 |
| 5 to 9 years | 1,164 |
| 10 to 14 years | 1,246 |
| 15 to 19 years | 1,217 |
| 20 to 24 years | 855 |
| 25 to 34 years | 1,914 |
| 35 to 44 years | 2,192 |
| 45 to 54 years | 2,404 |
| 55 to 59 years | 1,727 |
| 60 to 64 years | 1,277 |
| 65 to 74 years | 2,058 |
| 75 to 84 years | 1,014 |
| 85 years and over | 369 |
| Median age (years) | 43.7 |
| Under 18 years | 4,196 |
| 16 years and over | 14,829 |
| 18 years and over | 14,195 |
| 21 years and over | 13,716 |
| 62 years and over | 4,301 |
| 65 years and over | 3,441 |
| Total population | 18,391 |
| One race | 17,741 |
| White | 17,413 |
| Black or African American | 133 |
| American Indian and Alaska Native | 90 |
| Asian | 22 |
| Native Hawaiian and Other Pacific Islander | 0 |
| Some other race | 83 |
| Two or more races | 650 |
| Citizen, VOTING AGE 18 and over population | 14,092 |
| Male Citizen, VOTING AGE 18 and over population | 7,105 |
| Female Citizen, VOTING AGE 18 and over population | 6,987 |
Social characteristics in Jefferson County, Kansas
| Total households | 7,262 |
| Family households (families) | 4,255 |
| Married-couple family | 416 |
| Male householder, no wife present, family | 1,056 |
| Female householder, no husband present, family | 713 |
| Nonfamily households | 1,535 |
| Average household size | 2,374 |
| Average family size | 2.51 |
Economic characteristics in Jefferson County, Kansas
| Total households | 7,262 |
| Less than $10,000 | 191 |
| $10,000 to $14,999 | 200 |
| $15,000 to $24,999 | 597 |
| $25,000 to $34,999 | 567 |
| $35,000 to $49,999 | 659 |
| $50,000 to $74,999 | 1,525 |
| $75,000 to $99,999 | 1,117 |
| $100,000 to $149,999 | 1,550 |
| $150,000 to $199,999 | 515 |
| $200,000 or more | 341 |
| Median household income (dollars) | 72,270 |
Housing characteristics in Jefferson County, Kansas
| Total housing units | 7,963 |
| Occupied housing units | 7,262 |
| Vacant housing units | 701 |
| Total housing units | 7,963 |
| 1-unit, detached | 6,913 |
| 1-unit, attached | 41 |
| 2 units | 209 |
| 3 or 4 units | 108 |
| 5 to 9 units | 39 |
| 10 to 19 units | 24 |
| 20 or more units | 14 |
| Mobile home | 615 |
| Boat, RV, van, etc. | 0 |
| Total housing units | 7,963 |
| Built 2014 or later | 0 |
| Built 2010 to 2013 | 525 |
| Built 2000 to 2009 | 911 |
| Built 1990 to 1999 | 1,203 |
| Built 1980 to 1989 | 835 |
| Built 1970 to 1979 | 1,586 |
| Built 1960 to 1969 | 767 |
| Built 1950 to 1959 | 467 |
| Built 1940 to 1949 | 164 |
| Built 1939 or earlier | 1,505 |
| Total housing units | 7,963 |
| 1 room | 31 |
| 2 rooms | 22 |
| 3 rooms | 293 |
| 4 rooms | 809 |
| 5 rooms | 1,489 |
| 6 rooms | 1,611 |
| 7 rooms | 1,335 |
| 8 rooms | 1,010 |
| 9 rooms or more | 1,363 |
| Median rooms | 6.3 |
| Total housing units | 7,963 |
| No bedroom | 45 |
| 1 bedroom | 432 |
| 2 bedrooms | 1,839 |
| 3 bedrooms | 3,662 |
| 4 bedrooms | 1,586 |
| 5 or more bedrooms | 399 |
| Occupied housing units | 7,262 |
| Owner-occupied | 6,121 |
| Renter-occupied | 1,141 |
| Average household size of owner-occupied unit | 2.54 |
| Average household size of renter-occupied unit | 2.31 |
| Occupied housing units | 7,262 |
| Moved in 2017 or later | 517 |
| Moved in 2015 to 2016 | 1,605 |
| Moved in 2010 to 2014 | 1,118 |
| Moved in 2000 to 2009 | 1,632 |
| Moved in 1990 to 1999 | 1,213 |
| Moved in 1989 and earlier | 1,177 |
| Owner-occupied units | 6,121 |
| Less than $50,000 | 319 |
| $50,000 to $99,999 | 833 |
| $100,000 to $149,999 | 1,308 |
| $150,000 to $199,999 | 1,130 |
| $200,000 to $299,999 | 1,546 |
| $300,000 to $499,999 | 727 |
| $500,000 to $999,999 | 180 |
| $1,000,000 or more | 78 |
| Median (dollars) | 169,900 |
| Owner-occupied units | 6,121 |
| Housing units with a mortgage | 3,519 |
| Housing units without a mortgage | 2,602 |
| Occupied units paying rent | 1,030 |
| Less than $500 | 128 |
| $500 to $999 | 723 |
| $1,000 to $1,499 | 170 |
| $1,500 to $1,999 | 9 |
| $2,000 to $2,499 | 0 |
| $2,500 to $2,999 | 0 |
| $3,000 or more | 0 |
| Median (dollars) | 770 |
| No rent paid | 111 |
Demographic data for Jefferson County, KS and each city in the county. Lists of cities by population, wealth and poverty in Jefferson County, KS.
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