Union County is in North New Jersey. Of the 21 counties in the Garden State, 67,513-acre Union County ranks 20th by size. New Jersey's Union County has approximately 1,000 acres of undeveloped land for sale based on recent Land Network data. The combined market value of farms and rural land for sale here was about $7 million. The average price of undeveloped acreage for sale in Union County was $4 million. Some suggested uses for undeveloped land currently for sale in Union County include for commercial, hunting/fishing, and orchard use. Current commercial applications for commercial property for sale in Union County include for commercial, hunting/fishing and orchard use. Browse all New Jersey undeveloped land for sale on the Land Network to find your next commercial property or land investment.