Clay County IL Information


Clay County Subdivisions

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


Total Population 13,357
Population in Households 13,052
Population in Familes 10,524
Population in Group Qrtrs 305
Population Density1 29
Diversity Index2 9


Median Household Income $43,779
Average Household Income $58,371
Per Capita Income $24,591


Total Housing Units 6,404 (100%)
Owner Occupied HU 4,408 (68.8%)
Renter Occupied HU 1,174 (18.3%)
Vacant Housing Units 822 (12.8%)
Median Home Value $87,457
Average Home Value $120,945


Total Households 5,582
Average Household Size 2.34
Family Households 3,661
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 -0.41% -0.56%
Households -0.25% -0.47%
Families -0.42% -0.59%
Median Household Income   1.07%
Per Capita Income   1.8%


Clay County IL - Peer Comparisons by Rank and Percentile

The table below compares Clay 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 # 81 22nd
Population Density # 83 22nd
Diversity Index # 79 22nd
Median Household Income # 88 15th
Per Capita Income # 79 24th

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