Rock Island County is located in the state of Illinois, along the Mississippi River. It is part of the Quad Cities metropolitan area, which includes cities like Moline and Rock Island. The county covers an area of approximately 453 square miles and has a diverse landscape that includes urban areas, farmland, and parks. The county seat is Rock Island, which is known for its historical significance and cultural attractions. Rock Island County offers various recreational opportunities, including hiking, fishing, and boating, particularly in the Rock Island Arsenal and surrounding natural areas. The population is diverse, contributing to a rich community life.