Washington County is in Pittsburgh & Countryside Pennsylvania. Of the 67 counties in the Keystone State, 860-square-mile Washington County ranks 20th by size. Pennsylvania's Washington County includes around 1,000 acres of undeveloped land for sale based on recent Land Network data. The combined market value of farmsand rural real estate for sale here was almost $6 million. The average price of undeveloped land for sale in Washington County was $319,805. 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 bear, whitetail deer, deer, turkey and pheasant. Current commercial applications for commercial property for sale in Washington County include for hunting/fishing, commercial and homestead use. Browse all Pennsylvania undeveloped acreage for sale on the Land Network to find your next commercial property or land investment.