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

Mason County is situated in the central part of Illinois. This well known county was named after Mason County, Kentucky, itself named after George Mason. The area of Mason County is about 539 square miles. This county, set up in 1841, is populated today by 13 thousand residents. Havana is the county seat of Mason County. This map shows the borders of Mason 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 Mason County.