DeKalb County IL Information


DeKalb County Subdivisions

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


Total Population 106,119
Daytime Population: Workers 44,161
Daytime Population: Residents 51,785
Total Daytime Population (TDP) 95,946
Ratio TDP/Total Population1 0.90
Population in Households 100,057
Population in Familes 74,446
Population in Group Qrtrs 6,062
Population Density2 168
Diversity Index3 45


Median Household Income $55,465
Average Household Income $70,904
Per Capita Income $26,914


Total Housing Units 41,538 (100%)
Owner Occupied HU 22,856 (55.0%)
Renter Occupied HU 16,136 (38.8%)
Vacant Housing Units 2,546 ( 6.1%)
Median Home Value $182,840
Average Home Value $208,765


Total Households 38,992
Average Household Size 2.57
Family Households 23,766
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% 0.64%
Households 0.18% 0.65%
Families -0.01% 0.53%
Median Household Income   1.38%
Per Capita Income   2.46%


DeKalb County IL - Peer Comparisons by Rank and Percentile

The table below compares DeKalb 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 # 20 81st
Population Density # 18 83rd
Diversity Index # 19 82nd
Median Household Income # 20 81st
Per Capita Income # 39 63rd

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