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

Union County is found in the southern part of Illinois. This awesome county was named after The union of the United States. The population of Union County exceeds 17 thousand people. The county, formed in 1818, covers an area of 413 square miles. The county seat of Union County is Jonesboro. This map shows the borders of Union 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 Union County.