Of 36 counties in the Beaver State, Columbia County ranks 33rd in terms of size (688 square miles). Columbia County is in Northwest Oregon. A recent survey of Land Network data records about 1,000 acres of riverfront land and property for sale in Oregon's Columbia County, which is valued at a combined $3 million. 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.