Cook County IL Information


Cook County Subdivisions

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


Total Population 5,298,497
Population in Households 5,208,213
Population in Familes 4,093,248
Population in Group Qrtrs 90,284
Population Density1 5,605
Diversity Index2 78


Total Households 2,009,274
Average Household Size 2.59
Family Households 1,223,512
Average Family Size 3


Total Housing Units 2,225,938 (100%)
Owner Occupied HU 1,115,258 (50.1%)
Renter Occupied HU 894,016 (40.2%)
Vacant Housing Units 216,664 ( 9.7%)
Median Home Value $244,668
Average Home Value $317,961


Median Household Income $55,831
Average Household Income $81,895
Per Capita Income $31,544
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.32% 0.26%
Households 0.35% 0.28%
Families 0.16% 0.16%
Median Household Income   1.13%
Per Capita Income   1.49%
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.


Cook County IL - Peer Comparisons by Rank and Percentile

The table below compares Cook 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 # 1 100th
Population Density1 # 1 100th
Diversity Index2 # 1 100th
Median Household Income # 16 85th
Per Capita Income # 7 94th

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