Washington County is in Western Maryland. Of the 24 counties in the Terrapin State, Washington County is 15th in terms of its size (299,099 acres). The most common type of land for sale by combined acreage in Washington County is house. 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!