Knox County IL Information


Knox County Subdivisions

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


Total Population 52,632
Population in Households 48,677
Population in Familes 37,293
Population in Group Qrtrs 3,955
Population Density1 74
Diversity Index2 35


Total Households 21,353
Average Household Size 2.28
Family Households 13,061
Average Family Size 3


Total Housing Units 24,162 (100%)
Owner Occupied HU 14,374 (59.5%)
Renter Occupied HU 6,979 (28.9%)
Vacant Housing Units 2,809 (11.6%)
Median Home Value $85,421
Average Home Value $110,078


Median Household Income $42,895
Average Household Income $55,541
Per Capita Income $23,132
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.09% -0.21%
Households -0.14% -0.25%
Families -0.32% -0.37%
Median Household Income   1.15%
Per Capita Income   1.44%
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.


Knox County IL - Peer Comparisons by Rank and Percentile

The table below compares Knox 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 # 29 73rd
Population Density1 # 35 67th
Diversity Index2 # 26 75th
Median Household Income # 73 29th
Per Capita Income # 74 28th

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