About Cook County
Cook County is a county in Illinois (IL) with a population of approximately 5,087,072 residents. The county seat is .
Cook County is one of the counties that make up Illinois, providing local government services including law enforcement, property records, courts, and public infrastructure to its residents.
County Details
- County
- Cook County
- State
- Illinois (IL)
- Population
- 5,087,072
- County Seat
Local Government
Cook County residents are served by county-level government that typically includes:
- County commission or board of supervisors — Elected officials responsible for county governance, budgets, and policy
- Sheriff's office — Provides law enforcement services throughout Cook County
- County clerk — Manages vital records, elections, and property records
- County courts — The judicial branch serving Cook County residents
- Tax assessor — Handles property tax assessments and collections
Getting Involved
Residents of Cook County can participate in local government by attending county commission meetings, voting in local elections, and contacting their county and state representatives. Find your elected officials by browsing the Illinois representatives page.
Frequently Asked Questions
What is the population of Cook County?
Cook County has an approximate population of 5,087,072 residents.
What is the county seat of Cook County?
The county seat of Cook County is .
What state is Cook County in?
Cook County is located in Illinois (IL).