Cass County is in Western Illinois. Of the 102 counties in the Land of Lincoln, Cass County ranks 78th in terms of size (383 square miles). The most common type of land for sale by combined acreage in Cass County is house. Browse all waterfront property for sale in Cass 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!