Washington County is in Pittsburgh & Countryside Pennsylvania. Of the 67 counties in the Independence State, Washington County is 20th in terms of its size (860 square miles). Recent listings of undeveloped land for sale in Washington County, Pennsylvania, totals about 1,000 acres and a combined market value of roughly $10 million. The most common type of land for sale by combined acreage in Washington County is house. The average price of undeveloped acreage for sale in Washington County was $289,954. 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 deer, bear, turkey, whitetail deer, pheasant and blacktail deer. Current commercial applications for commercial property for sale in Washington County include for hunting/fishing, commercial and homestead use. Browse all Pennsylvania undeveloped land for sale on the Land Network to find your next commercial property or land investment.