Clinton County IL Information


Clinton County Subdivisions

Clinton County IL Data & Demographics (As of July 1, 2016)


Total Population 38,963
Population in Households 36,891
Population in Familes 30,291
Population in Group Qrtrs 2,072
Population Density1 82
Diversity Index2 19


Total Households 14,325
Average Household Size 2.58
Family Households 9,893
Average Family Size 3


Total Housing Units 15,895 (100%)
Owner Occupied HU 11,080 (69.7%)
Renter Occupied HU 3,245 (20.4%)
Vacant Housing Units 1,570 ( 9.9%)
Median Home Value $125,000
Average Home Value $148,549


Median Household Income $58,032
Average Household Income $72,991
Per Capita Income $27,699
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.5% 0.49%
Households 0.36% 0.41%
Families 0.22% 0.32%
Median Household Income   0.79%
Per Capita Income   1.19%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


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, 2016 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 Density1 # 31 71st
Diversity Index2 # 54 48th
Median Household Income # 12 89th
Per Capita Income # 23 78th

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