Hardin County is in Southern Illinois. Of the 102 counties in the Prairie State, Hardin County ranks 101st in terms of size (116,211 acres). The most common type of land for sale by combined acreage in Hardin County is house. Browse all waterfront property for sale in Hardin 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!