Union County is in Alleghenies & Valleys Pennsylvania. Of the 67 counties in the Keystone State, 317-square-mile Union County ranks 64th by size. There is approximately 1,000 acres of undeveloped land for sale in Union County, Pennsylvania, based on recent Land Network data. The combined market value of farms, rural land, hunting land and other land for sale here is approximately $1 million. The average price of undeveloped land for sale in Union County was $359,166. Some suggested uses for undeveloped land currently for sale in Union County include for hunting/fishing, commercial, and homestead use. Some common wildlife species to be found on undeveloped land for sale in Union County include deer, bear, turkey, whitetail deer, pheasant and blacktail deer. Current commercial applications for commercial property for sale in Union 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.