Rock Island County is in Western Illinois. Of the 102 counties in the Inland Empire, Rock Island County ranks 62nd in terms of size (288,824 acres). Recent listings of undeveloped land for sale in Illinois's Rock Island County totals approximately 1,000 acres and a combined market value of nearly $1 million. The most common type of land for sale by combined acreage in Rock Island County is undeveloped land. The average price of undeveloped acreage for sale in Rock Island County was $75,998. Some suggested uses for undeveloped land currently for sale in Rock Island County include for commercial, hunting/fishing, and agriculture use. Some common wildlife species to be found on undeveloped land for sale in Rock Island County include whitetail deer, turkey, deer, dove and ducks. Current commercial applications for commercial property for sale in Rock Island County include for commercial, hunting/fishing and agriculture use. Browse all Illinois undeveloped acreage for sale on the Land Network to find your next commercial property or land investment.