Warren County on the map of Illinois 2024. Cities, roads, borders and directions in Warren County of Illinois.

Warren County is found in the western part of Illinois. This famous county was named after Joseph Warren (1741-1775), played a role in American Patriot movements. The population of Warren County exceeds 17 thousand people. The county, organized in 1825, covers an area of 542 square miles. The county seat of Warren County is Monmouth. This map shows the borders of Warren County as well as neighboring counties, including major highways and natural objecsts as of 2024. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it. Also check out the satellite map of Warren County.