Of 36 counties in the Beaver State, Columbia County ranks 33rd by size (688 square miles). Columbia County is in Northwest Oregon. Recent listings of riverfront homes and property for sale in Columbia County, Oregon, totals roughly 1,000 acres and a combined market value of about $3 million. The most common type of land for sale by combined acreage in Columbia County is residential property. 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.