Warren County

Warren County is an administrative division in western Illinois that encompasses farmland and gently rolling terrain across its territory. The county seat of Monmouth serves as the main hub where government offices and community services are centered.

Established in 1825, the county took its name from Dr. Joseph Warren, an officer killed during the Battle of Bunker Hill in 1775. A portion of its western territory later became Henderson County when it separated in 1841.

The county seat of Monmouth displays numerous buildings from the 1800s that reflect the area's past through their architecture and design. These structures shape how visitors experience the downtown, serving as gathering points for the community.

The county's central hub is Monmouth, where the courthouse and main public services are located for residents and visitors. Getting around the area requires a vehicle since services and attractions are spread across the rural landscape.

The courthouse building was constructed from red-colored sandstone, giving it a distinctive appearance that sets it apart from other government structures of its era. This locally sourced material reflects construction practices of the late 1800s.

Location: Illinois

Inception: 1825

Capital city: Monmouth

Shares border with: Mercer County, Knox County, Fulton County, McDonough County, Henderson County

Website: http://warrencountyil.com

GPS coordinates: 40.85000,-90.61000

Latest update: December 7, 2025 20:24