In 2019, Cook County, IL had a population of 5.15M people with a median age of 37.2 and a median household income of $69,429. Between 2018 and 2019 the population of Cook County, IL declined from 5.18M to 5.15M, a −0.584% decrease and its median household income grew from $63,353 to $69,429, a 9.59% increase.
The 5 largest ethnic groups in Cook County, IL are White (Non-Hispanic) (41.8%), Black or African American (Non-Hispanic) (22.7%), White (Hispanic) (14.8%), Other (Hispanic) (9.16%), and Asian (Non-Hispanic) (7.56%). 35.3% of the households in Cook County, IL speak a non-English language at home as their primary language.
90.2% of the residents in Cook County, IL are U.S. citizens.
In 2019, the median property value in Cook County, IL was $261,400, and the homeownership rate was 56.7%. Most people in Cook County, IL drove alone to work, and the average commute time was 31.9 minutes. The average car ownership in Cook County, IL was 2 cars per household.