Located in Central Illinois, 877-square-mile Sangamon County is one of the ten biggest counties in the Prairie State. The most common type of land for sale by combined acreage in Sangamon County is homesite. Browse all waterfront property for sale in Sangamon 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!