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

Rock Island County is found on the western border of Illinois. This famous county was named after Rock Island. The population of Rock Island County exceeds 143 thousand people. The county, organized in 1831, covers an area of 427 square miles. The county seat of Rock Island County is Rock Island. This map shows the borders of Rock Island 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 Rock Island County.