Knox County IL Information


Knox County Subdivisions

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


Total Population 51,791
Daytime Population: Workers 21,477
Daytime Population: Residents 28,040
Total Daytime Population (TDP) 49,517
Ratio TDP/Total Population1 0.96
Population in Households 47,836
Population in Familes 36,636
Population in Group Qrtrs 3,955
Population Density2 72
Diversity Index3 35


Median Household Income $43,894
Average Household Income $57,555
Per Capita Income $23,932


Total Housing Units 24,077 (100%)
Owner Occupied HU 14,054 (58.4%)
Renter Occupied HU 6,934 (28.8%)
Vacant Housing Units 3,089 (12.8%)
Median Home Value $86,084
Average Home Value $109,712


Total Households 20,988
Average Household Size 2.28
Family Households 12,808
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 -0.3% -0.58%
Households -0.35% -0.65%
Families -0.54% -0.77%
Median Household Income   1.4%
Per Capita Income   2.34%


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, 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 # 29 73rd
Population Density # 35 67th
Diversity Index # 26 75th
Median Household Income # 83 20th
Per Capita Income # 77 25th

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