Of 39 counties in the state, Columbia County is 31st in terms of its size (873 square miles). Columbia County is in Eastern Washington. Recent Land Network data shows nearly 1,000 acres of lakefront homes and property for sale in Washington's Columbia County, which is valued at a combined $395,000. 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.