Washington County is in Portland Metro Oregon. Of the 36 counties in the state, 726-square-mile Washington County ranks 31st by size. There is about 1,000 acres of undeveloped land for sale in Washington County, Oregon, based on recent Land Network data. The combined market value of farms and ranches for sale here is almost $53 million. The average price of undeveloped land for sale in Washington County was $1 million. Some suggested uses for undeveloped land currently for sale in Washington County include for hunting/fishing, commercial, and homestead use. Some common wildlife species to be found on undeveloped land for sale in Washington County include elk, turkey, mule deer, deer and quail. Current commercial applications for commercial property for sale in Washington County include for hunting/fishing, commercial and homestead use. Browse all Oregon undeveloped land for sale on the Land Network to find your next commercial property or land investment.