Land for sale in Adams County recently totaled $4 million and nearly 1,000 acres. Adams County ranks 95th out of 99 counties in the Hawkeye State for the combined amount of land currently advertised for sale. There were two properties listed as sold in Adams County through the Land Network Comparable Sales Program. This represented a total value of $1,287,600. Corning had the most land for sale. Manufacturing and related services are the largest economic sectors in Adams County. Adams County is Iowa's 92nd largest county (425 square miles). It's located in the Western Iowa region of the state.