Illinois Census & Demographic Data - July 1, 2017


Illinois Census Data

The tables below provide updated data and demographic estimates for Illinois as of July 1, 2017. Our Illinois Census Data Comparison Tool allows you to compare and rank IL cities, towns, ZIP Codes and Counties.

Illinois Data & Demographics (As of July 1, 2017)


Total Population 13,027,812
Daytime Population: Workers 6,314,916
Daytime Population: Residents 6,659,618
Total Daytime Population (TDP) 12,974,534
Ratio TDP/Total Population1 1.00
Population in Households 12,727,528
Population in Familes 10,283,409
Population in Group Qrtrs 300,284
Population Density2 235
Diversity Index3 64


Median Household Income $59,409
Average Household Income $84,983
Per Capita Income $32,580


Total Housing Units 5,405,979 (100%)
Owner Occupied HU 3,184,564 (58.9%)
Renter Occupied HU 1,730,813 (32.0%)
Vacant Housing Units 490,602 ( 9.1%)
Median Home Value $195,300
Average Home Value $255,554


Total Households 4,915,377
Average Household Size 2.59
Family Households 3,195,494
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 0.21% 0.17%
Households 0.22% 0.17%
Families 0.05% 0.06%
Median Household Income   1.98%
Per Capita Income   2.42%