Of 102 counties in the state, Piatt County ranks 67th in terms of size (439 square miles). Piatt County is in Central Illinois. The total value of around 1,000 acres of lakefront homes and property recently listed for sale in Illinois's Piatt County was almost $1 million. Browse all waterfront property for sale in Piatt 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 Piatt County is house.