The value of all land and rural real estate for sale in Adams County, Illinois, recently was around $27 million, representing a combined 883 acres of land for sale in Adams County. Adams County ranks 35th out of 102 counties in the state for the total number of acres of land currently advertised for sale. There were five properties listed as sold in Adams County through the Land Network Comparable Sales Program. This represented a total value of $4,398,000. Of all land and rural real estate for sale in Adams County, Quincy had the most land for sale. Adams County is Illinois's 12th biggest county (871 square miles). It's located in the Western Illinois region of the state.