Clay County IL Information


Clay County Subdivisions

Clay County IL Data & Demographics (As of July 1, 2017)


Total Population 13,460
Daytime Population: Workers 6,542
Daytime Population: Residents 6,374
Total Daytime Population (TDP) 12,916
Ratio TDP/Total Population1 0.96
Population in Households 13,155
Population in Familes 10,573
Population in Group Qrtrs 305
Population Density2 29
Diversity Index3 9


Median Household Income $41,565
Average Household Income $56,540
Per Capita Income $23,546


Total Housing Units 6,387 (100%)
Owner Occupied HU 4,176 (65.4%)
Renter Occupied HU 1,383 (21.7%)
Vacant Housing Units 828 (13.0%)
Median Home Value $85,553
Average Home Value $112,410


Total Households 5,559
Average Household Size 2.37
Family Households 3,654
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 -0.36% -0.59%
Households -0.34% -0.58%
Families -0.5% -0.69%
Median Household Income   1.68%
Per Capita Income   2.73%


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, 2017 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 # 80 23rd
Population Density # 82 21st
Diversity Index # 81 23rd
Median Household Income # 94 9th
Per Capita Income # 84 19th

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