Cook County is a county in the U.S. state of Illinois. It is the second-most-populous county in the United States after Los Angeles County, California. As of 2017, the population was 5,211,263. Its county seat is Chicago, the most populous city in Illinois and the third-most-populous city in the United States.

Cook County

County

United States of America

County governments in the United States function as local administrative arms within the states. County governments serve a larger geographical area than cities and towns, but a smaller area than states.  As such, they are essentially administrative units of the state. The most common form of county government is the commission system. Under this structure, an elected commission, which generally consists of a small number of commissioners, serves as the governing body within the county, performing all legislative and executive functions. These include adopting a budget, passing county resolutions, and hiring and firing county officials. The highest-ranking county official is typically known as the county commissioner or county supervisor.

Irvine

California

Government

Deer Creek

Illinois

10,001+ Employees

Green Halo provides web-based Construction & Demolition disposal record keeping and analysis. This system enhances ...

Careers and Openings at Cook County