About St. Clair County
St. Clair County is a county in Illinois (IL) with a population of approximately 251,018 residents. The county seat is .
St. Clair 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
- St. Clair County
- State
- Illinois (IL)
- Population
- 251,018
- County Seat
Local Government
St. Clair 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 St. Clair County
- County clerk — Manages vital records, elections, and property records
- County courts — The judicial branch serving St. Clair County residents
- Tax assessor — Handles property tax assessments and collections
Getting Involved
Residents of St. Clair 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 St. Clair County?
St. Clair County has an approximate population of 251,018 residents.
What is the county seat of St. Clair County?
The county seat of St. Clair County is .
What state is St. Clair County in?
St. Clair County is located in Illinois (IL).