Illinois Census Data


Illinois Census Data

The tables below provide updated data and demographic estimates for Illinois as of July 1, 2016. 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, 2016)


Total Population 13,022,485
Population in Households 12,722,534
Population in Familes 10,282,327
Population in Group Qrtrs 299,951
Population Density1 235
Diversity Index2 63


Total Households 4,911,410
Average Household Size 2.59
Family Households 3,198,998
Average Family Size 3


Total Housing Units 5,404,592 (100%)
Owner Occupied HU 3,199,558 (59.2%)
Renter Occupied HU 1,711,852 (31.7%)
Vacant Housing Units 493,182 ( 9.1%)
Median Home Value $190,380
Average Home Value $254,002


Median Household Income $57,337
Average Household Income $80,916
Per Capita Income $31,032
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.24% 0.22%
Households 0.24% 0.21%
Families 0.08% 0.11%
Median Household Income   1.32%
Per Capita Income   1.48%
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.