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Cook County is an urban county in the upper northeastern section of the State of Illinois that contains more than 800 local governmental units within its boundaries. With a population of approximately 5.2 million people, it is the second most populous county in the nation and the 19th largest government in the United States (2015 census ...
Government of Cook County, Illinois. The government of Cook County, Illinois, is primarily composed of the Board of Commissioners, other elected officials such as the Sheriff, State's Attorney, Treasurer, Board of Review, Clerk, Assessor, Cook County Circuit Court judges and Circuit Court Clerk, as well as numerous other officers and entities.
Cook County is a county in the American state of Illinois. Chicago is the county seat of Cook County. Los Angeles County, California is the only county with a higher population than Cook County. About 5,276,000 people live in Cook County. This is 41 percent of all the people who live in Illinois.
Unincorporated County Services. Veterans' Services. Vital Records. Voting and Elections. Your Health. Cook County contains 134 municipalities in its region, the most well known being the City of Chicago – which is the County seat where the central offices of Cook County are located.
More than 40 percent of all residents of Illinois live within Cook County. As of 2020, the population was 5,275,541. The county seat is Chicago, the most populous city in Illinois and the third most populous city in the United States. The county is at the center of the Chicago metropolitan area.
In 2021, Cook County, IL had a population of 5.27M people with a median age of 37.3 and a median household income of $72,121. Between 2020 and 2021 the population of Cook County, IL grew from 5.17M to 5.27M, a 1.85% increase and its median household income grew from $67,886 to $72,121, a 6.24% increase.
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.
