Of 88 counties in the state, Washington County ranks eighth in terms of size (639 square miles). Washington County is in Southeast Ohio. Washington County, Ohio, has almost 1,000 acres of riverfront property for sale based on recent Land Network data. The combined market value of land and rural real estate for sale here was about $900,000. 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 residential property.