Clinton County IL Information


Clinton County Subdivisions

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


Total Population 38,454
Population in Households 36,382
Population in Familes 29,956
Population in Group Qrtrs 2,072
Population Density1 81
Diversity Index2 19


Median Household Income $61,555
Average Household Income $79,156
Per Capita Income $30,542


Total Housing Units 15,892 (100%)
Owner Occupied HU 11,756 (74.0%)
Renter Occupied HU 2,656 (16.7%)
Vacant Housing Units 1,480 ( 9.3%)
Median Home Value $134,516
Average Home Value $162,613


Total Households 14,412
Average Household Size 2.52
Family Households 9,914
Average Family Size 3
  1. Population Density = Total Population per square mile.
  2. 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 0.22% 0.24%
Households 0.35% 0.33%
Families 0.19% 0.22%
Median Household Income   2.31%
Per Capita Income   2.88%


Clinton County IL - Peer Comparisons by Rank and Percentile

The table below compares Clinton 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 # 37 65th
Population Density # 31 71st
Diversity Index # 54 48th
Median Household Income # 13 88th
Per Capita Income # 18 83rd

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