Union County is in Alleghenies & Valleys Pennsylvania. Of the 67 counties in the Keystone State, 203,358-acre Union County ranks 64th by size. Recent listings of undeveloped land for sale in Pennsylvania's Union County totals almost 1,000 acres and a combined market value of nearly $2 million. By overall acreage, residential property is the most common type of land for sale in Union County. The average price of undeveloped acreage for sale in Union County was $238,666. 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 bear, whitetail deer, turkey, deer 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.