Jefferson County IL Information


Jefferson County Subdivisions

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


Total Population 38,462
Daytime Population: Workers 21,340
Daytime Population: Residents 19,923
Total Daytime Population (TDP) 41,263
Ratio TDP/Total Population1 1.07
Population in Households 36,224
Population in Familes 29,053
Population in Group Qrtrs 2,238
Population Density2 67
Diversity Index3 29


Median Household Income $43,382
Average Household Income $59,780
Per Capita Income $24,321


Total Housing Units 17,038 (100%)
Owner Occupied HU 10,751 (63.1%)
Renter Occupied HU 4,502 (26.4%)
Vacant Housing Units 1,785 (10.5%)
Median Home Value $95,570
Average Home Value $125,209


Total Households 15,253
Average Household Size 2.37
Family Households 9,945
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 -0.13% -0.27%
Households -0.1% -0.26%
Families -0.27% -0.37%
Median Household Income   1.67%
Per Capita Income   2.79%


Jefferson County IL - Peer Comparisons by Rank and Percentile

The table below compares Jefferson 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 # 38 64th
Population Density # 38 64th
Diversity Index # 38 64th
Median Household Income # 86 17th
Per Capita Income # 71 31st

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