Clark County IL Information


Clark County Subdivisions

Clark County IL Data & Demographics (As of July 1, 2018)


Total Population 15,971
Population in Households 15,750
Population in Familes 12,851
Population in Group Qrtrs 221
Population Density2 32
Diversity Index3 9


Median Household Income $50,036
Average Household Income $63,731
Per Capita Income $26,692


Total Housing Units 7,760 (100%)
Owner Occupied HU 4,904 (63.2%)
Renter Occupied HU 1,755 (22.6%)
Vacant Housing Units 1,101 (14.2%)
Median Home Value $97,054
Average Home Value $131,780


Total Households 6,659
Average Household Size 2.37
Family Households 4,447
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population -0.27% -0.34%
Households -0.22% -0.31%
Families -0.39% -0.42%
Median Household Income   0.87%
Per Capita Income   2.21%


Clark County IL - Peer Comparisons by Rank and Percentile

The table below compares Clark County to the other 102 counties and county equivalents in Illinois by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 72 30th
Population Density # 72 30th
Diversity Index # 85 18th
Median Household Income # 58 44th
Per Capita Income # 54 48th

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.