Of 39 counties in the Evergreen State, Columbia County ranks 31st by size (873 square miles). Columbia County is in Eastern Washington. The total value of almost 1,000 acres of riverfront land recently listed for sale in Washington's Columbia County was roughly $500,000. 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 residential property.