San Juan County is in Puget Sound Washington. Of the 39 counties in the Evergreen State, 620-square-mile San Juan County ranks 36th by size. San Juan County, Washington, includes 1,000 acres of undeveloped land for sale based on recent Land Network data. The combined market value of farms, ranches, hunting land and other land for sale here was about $4 million. The average price of undeveloped land for sale in San Juan County was $894,500. Some suggested uses for undeveloped land currently for sale in San Juan County include for hunting/fishing, commercial, and orchard use. Some common wildlife species to be found on undeveloped land for sale in San Juan County include elk, turkey, whitetail deer, bear, deer, grouse and quail. Current commercial applications for commercial property for sale in San Juan County include for hunting/fishing, commercial and orchard use. Browse all Washington undeveloped acreage for sale on the Land Network to find your next commercial property or land investment.