Calhoun County is in Southwest Illinois. Of the 102 counties in the Prairie State, 283-square-mile Calhoun County ranks 93rd by size. Recent listings of residential land and property for sale in Calhoun County, Illinois, totals about 1,000 acres and a combined market value of roughly $10 million. The most common type of land for sale by combined acreage in Calhoun County is undeveloped land. The average price of residential acreage for sale in Calhoun County was $657,658. The county has a rural, farm-based economy. Browse all residential land and rural property for sale in Illinois to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.