Of 72 counties in the Badger State, Washington County is 68th in terms of its size (435 square miles). Washington County is in Southeast Wisconsin. The total value of approximately 1,000 acres of riverfront land recently listed for sale in Wisconsin's Washington County was approximately $1 million. Browse all waterfront property for sale in Washington 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 Washington County is house.