Warren County is a rural community, rich in tradition and history. A wonderful place to live and to raise a family. Questions? Need Assistance?

Warren County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 16,835. [2] Its county seat is Monmouth. [3]

Use your current location to find what county you are in. You can also click on the map or enter an address to find your county.

County Lookup to lookup any county based on the address. If you don't know the exact address, you can lookup the county by entering the state and city. What County Am I In? By default, the …

This free county lookup tool allows you to figure out what US county you're in by doing a search of your address.

County organization was completed in July, 1830. Named for Joseph Warren, a physician and soldier who served at Lexington, a Major General of the Massachusetts militia. He was killed …

Map of Warren County - Warren County is a county located in the U.S. state of Illinois. Warren County Map showing cities, highways, important places and water bodies.

Warren County, Illinois, located in the heart of the Midwest, offers a blend of natural beauty and rich history. The county is renowned for its picturesque landscapes, including the scenic Lusk …

Information on the FIPS county code, county seat, year of establishment, origin, etymology, population, area and map of each county is included in the table below. Note: the links in the …

Direct links to Illinois County Government websites. * Website not available.