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Find information and services for Cook County residents, businesses and visitors. Learn about Project Rainbow, discount parking, manufacturing apprenticeships, solid waste and more.
- Property Taxes
The Cook County Property Tax Portal is the result of...
- Services
Services - Cook County Government, Illinois | Cook County
- Birth Certificate
The Cook County Clerk's office keeps official records of...
- Contact Us
For non-emergencies and general inquiries about the County,...
- Locate an Inmate
The Cook County Sheriff offers an online inmate locator...
- Agencies
Agencies - Cook County Government, Illinois | Cook County
- Jobs and Employment
Cook County offers the chance to participate in a strong...
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County Clerk; Chief Judge; Recorder of Deeds; Sheriff;...
- Officials
Officials - Cook County Government, Illinois | Cook County
- Calendar
The Cook County Department of Veterans Affairs and the...
- Property Taxes
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.
Learn about the history, population, government and services of Cook County, the second most populous county in the nation. Cook County contains 134 municipalities, including the City of Chicago, and is governed by a 17-member Board of Commissioners.
Jan 15, 2024 · The Cook County Property Tax Portal is the result of collaboration among the elected officials who take part in the property tax system; the Portal consolidates information and delivers Cook County taxpayers a one-stop customer service website.
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.
Jun 18, 2024 · Explore the population changes, racial and ethnic makeup, age distribution, and migration patterns of Cook County, IL from 2010 to 2022. See how the county ranks among other counties and states in the US and compare the data sources and methods.
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.
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