Of 102 counties in the Land of Lincoln, Calhoun County ranks 93rd by size (283 square miles). Calhoun County is in Southwest Illinois. Recent Land Network data includes almost 1,000 acres of riverfront homes and property for sale in Illinois's Calhoun County, which is valued at a combined $1 million. Browse all waterfront property for sale in Calhoun County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Calhoun County is undeveloped land.