Of 36 counties in the Union State, Polk County is 30th in terms of its size (744 square miles). Polk County is in Northwest Oregon. Oregon's Polk County includes roughly 1,000 acres of riverfront homes and property for sale based on recent Land Network data. The combined market value of farms and ranches for sale here was $10 million. Browse all waterfront property for sale in Polk 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 Polk County is residential property.