Of 39 counties in the Evergreen State, Columbia County is 31st in terms of its size (873 square miles). Columbia County is in Eastern Washington. Recent listings of riverfront land and property for sale in Washington's Columbia County totals approximately 1,000 acres and a combined market value of almost $500,000. The most common type of land for sale by combined acreage in Columbia County is farms. Browse all waterfront property for sale in Columbia 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 Columbia County is farms.