In 2018, Cook County, IL had a population of 5.18M people with a median age of 37 and a median household income of $63,353. Between 2017 and 2018 the population of Cook County, IL declined from 5.21M to 5.18M, a -0.59% decrease and its median household income grew from $61,405 to $63,353, a 3.17% increase.
The 5 largest ethnic groups in Cook County, IL are White (Non-Hispanic) (41.9%), Black or African American (Non-Hispanic) (22.8%), White (Hispanic) (15.3%), Other (Hispanic) (8.76%), and Asian (Non-Hispanic) (7.47%). 35.6% of the households in Cook County, IL speak a non-English language at home as their primary language, and 90% of the residents in Cook County, IL are U.S. citizens.
In 2018, the median property value in Cook County, IL was $255,900, and the homeownership rate was 57.2%. 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.