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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.
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.
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 ...
The Cook County Clerk is the chief election officer for Cook County. The Clerk is also responsible for maintaining and providing vital records, various aspects of the real estate tax process, receiving and making available to the public statements of economic interests and lobbyist registration, and serving as Clerk to the County Board of ...
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.
In 2022, Cook County, IL had a population of 5.23M people with a median age of 37.5 and a median household income of $78,304. Between 2021 and 2022 the population of Cook County, IL declined from 5.27M to 5.23M, a −0.76% decrease and its median household income grew from $72,121 to $78,304, a 8.57% increase.
Cook County, Illinois has 944.9 square miles of land area and is the 6th largest county in Illinois by total area. Topics in the Cook County, Illinois data profile include: Populations and People; Income and Poverty; Education; Employment; Housing; Health; Business and Economy; Families and Living Arrangements; Race and Ethnicity.
Because of population growth in northeastern Illinois in the 1830s, Cook County lost over half its territory, but continued to increase in population. By 1839, it comprised 954 square miles and followed its current irregular boundaries.
May 17, 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, Illinois. QuickFacts provides statistics for all states and counties, and for cities and towns with a population of 5,000 or more.
