Clark County, Illinois demographics
Population: 15,587
Median age: 41.8
Median household income: 66,067
Demographics, population, home values, social and economic characteristics of Clark County, Illinois.
Population
| 2021 | 15,587 |
| 2020 | 15,602 |
| 2019 | 15,716 |
| 2018 | 15,836 |
| 2017 | 15,924 |
| 2016 | 16,089 |
| 2015 | 16,159 |
| 2014 | 16,240 |
| 2013 | 16,284 |
| 2012 | 16,353 |
| 2011 | 16,442 |
| 2010 | 16,545 |
| 2009 | 16,778 |
Clark County, IL cities
Casey city - 2,422
Marshall city - 3,870
Martinsville city - 1,314
West Union CDP - 187
Westfield village - 521
Census data for Clark County, Illinois
Demographic and housing estimates in Clark County, Illinois
| Total population | 15,587 |
| Male | 7,765 |
| Female | 7,822 |
| Total population | 15,587 |
| Under 5 years | 893 |
| 5 to 9 years | 1,039 |
| 10 to 14 years | 1,017 |
| 15 to 19 years | 985 |
| 20 to 24 years | 785 |
| 25 to 34 years | 1,713 |
| 35 to 44 years | 1,776 |
| 45 to 54 years | 2,002 |
| 55 to 59 years | 1,186 |
| 60 to 64 years | 1,149 |
| 65 to 74 years | 1,701 |
| 75 to 84 years | 873 |
| 85 years and over | 468 |
| Median age (years) | 41.8 |
| Under 18 years | 3,620 |
| 16 years and over | 12,345 |
| 18 years and over | 11,967 |
| 21 years and over | 11,505 |
| 62 years and over | 3,799 |
| 65 years and over | 3,042 |
| Total population | 15,587 |
| One race | 15,254 |
| White | 15,042 |
| Black or African American | 118 |
| American Indian and Alaska Native | 9 |
| Asian | 77 |
| Native Hawaiian and Other Pacific Islander | 0 |
| Some other race | 8 |
| Two or more races | 333 |
| Citizen, VOTING AGE 18 and over population | 11,917 |
| Male Citizen, VOTING AGE 18 and over population | 5,873 |
| Female Citizen, VOTING AGE 18 and over population | 6,044 |
Social characteristics in Clark County, Illinois
| Total households | 6,379 |
| Family households (families) | 3,555 |
| Married-couple family | 517 |
| Male householder, no wife present, family | 882 |
| Female householder, no husband present, family | 656 |
| Nonfamily households | 1,425 |
| Average household size | 2,056 |
| Average family size | 2.41 |
Economic characteristics in Clark County, Illinois
| Total households | 6,379 |
| Less than $10,000 | 158 |
| $10,000 to $14,999 | 327 |
| $15,000 to $24,999 | 575 |
| $25,000 to $34,999 | 429 |
| $35,000 to $49,999 | 979 |
| $50,000 to $74,999 | 1,114 |
| $75,000 to $99,999 | 1,031 |
| $100,000 to $149,999 | 1,264 |
| $150,000 to $199,999 | 279 |
| $200,000 or more | 223 |
| Median household income (dollars) | 66,067 |
Housing characteristics in Clark County, Illinois
| Total housing units | 7,378 |
| Occupied housing units | 6,379 |
| Vacant housing units | 999 |
| Total housing units | 7,378 |
| 1-unit, detached | 5,955 |
| 1-unit, attached | 70 |
| 2 units | 153 |
| 3 or 4 units | 256 |
| 5 to 9 units | 204 |
| 10 to 19 units | 49 |
| 20 or more units | 60 |
| Mobile home | 553 |
| Boat, RV, van, etc. | 78 |
| Total housing units | 7,378 |
| Built 2014 or later | 0 |
| Built 2010 to 2013 | 300 |
| Built 2000 to 2009 | 864 |
| Built 1990 to 1999 | 584 |
| Built 1980 to 1989 | 574 |
| Built 1970 to 1979 | 1,111 |
| Built 1960 to 1969 | 833 |
| Built 1950 to 1959 | 767 |
| Built 1940 to 1949 | 544 |
| Built 1939 or earlier | 1,801 |
| Total housing units | 7,378 |
| 1 room | 121 |
| 2 rooms | 135 |
| 3 rooms | 272 |
| 4 rooms | 847 |
| 5 rooms | 1,467 |
| 6 rooms | 1,504 |
| 7 rooms | 1,058 |
| 8 rooms | 1,001 |
| 9 rooms or more | 973 |
| Median rooms | 6.1 |
| Total housing units | 7,378 |
| No bedroom | 121 |
| 1 bedroom | 536 |
| 2 bedrooms | 1,953 |
| 3 bedrooms | 3,410 |
| 4 bedrooms | 1,061 |
| 5 or more bedrooms | 297 |
| Occupied housing units | 6,379 |
| Owner-occupied | 5,104 |
| Renter-occupied | 1,275 |
| Average household size of owner-occupied unit | 2.45 |
| Average household size of renter-occupied unit | 2.24 |
| Occupied housing units | 6,379 |
| Moved in 2017 or later | 313 |
| Moved in 2015 to 2016 | 1,454 |
| Moved in 2010 to 2014 | 1,222 |
| Moved in 2000 to 2009 | 1,325 |
| Moved in 1990 to 1999 | 776 |
| Moved in 1989 and earlier | 1,289 |
| Owner-occupied units | 5,104 |
| Less than $50,000 | 695 |
| $50,000 to $99,999 | 1,807 |
| $100,000 to $149,999 | 1,068 |
| $150,000 to $199,999 | 626 |
| $200,000 to $299,999 | 519 |
| $300,000 to $499,999 | 253 |
| $500,000 to $999,999 | 68 |
| $1,000,000 or more | 68 |
| Median (dollars) | 102,200 |
| Owner-occupied units | 5,104 |
| Housing units with a mortgage | 2,979 |
| Housing units without a mortgage | 2,125 |
| Occupied units paying rent | 1,133 |
| Less than $500 | 227 |
| $500 to $999 | 773 |
| $1,000 to $1,499 | 97 |
| $1,500 to $1,999 | 0 |
| $2,000 to $2,499 | 6 |
| $2,500 to $2,999 | 4 |
| $3,000 or more | 26 |
| Median (dollars) | 733 |
| No rent paid | 142 |
Demographic data for Clark County, IL and each city in the county. Lists of cities by population, wealth and poverty in Clark County, IL.
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