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Jul 1, 2022 · Cook County, Illinois. QuickFacts provides statistics for all states and counties. Also for cities and towns with a population of 5,000 or more.
Cook County is the most populous county in the U.S. state of Illinois and the second-most-populous county in the United States, after Los Angeles County, California. More than 40 percent of all residents of Illinois live within Cook County. As of 2020, the population was 5,275,541.
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Apr 10, 2024 · Discover Cook County, IL’s population & how it has changed over time. USAFacts uses Census data to break down the population of Cook County by race, age,and more. View today.
Cook County, IL had a population of 5.27M in 2021, with a median age of 37.3 and a median household income of $72,121. The largest ethnic groups are White (Non-Hispanic), Black or African American (Non-Hispanic), and White (Hispanic), and 90.1% of residents are U.S. citizens.
Census data for Cook County, IL (pop. 5,109,292), including age, race, sex, income, poverty, marital status, education and more.
Find out the latest population statistics for Cook County, Illinois, including race, ethnicity, age, gender, income, and more. See how the population has changed over the last 5 years and compare with other counties in Illinois.