In 2020, Cook County, IL had a population of 5.17M people with a median age of 37 and a median household income of $67,886. Between 2019 and 2020 the population of Cook County, IL declined from 5.2M to 5.17M, a −0.553% decrease and its median household income grew from $64,660 to $67,886, a 4.99% increase.
The 5 largest ethnic groups in Cook County, IL are White (Non-Hispanic) (42%), Black or African American (Non-Hispanic) (22.9%), White (Hispanic) (12.4%), Other (Hispanic) (9.34%), and Asian (Non-Hispanic) (7.39%).
None of the households in Cook County, IL reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
90% of the residents in Cook County, IL are U.S. citizens.
The largest universities in Cook County, IL are Northwestern University (9,290 degrees awarded in 2021), University of Illinois Chicago (8,910 degrees), and University of Chicago (6,805 degrees).
In 2020, the median property value in Cook County, IL was $255,500, and the homeownership rate was 57.2%.
Most people in Cook County, IL drove alone to work, and the average commute time was 33.2 minutes. The average car ownership in Cook County, IL was 2 cars per household.
Cook County, IL borders DuPage County, IL, Kane County, IL, Lake County, IL, McHenry County, IL, Will County, IL, Lake County, IN, Porter County, IN, and Berrien County, MI.