There was a total of approximately $18 million of land for sale in Union County, Pennsylvania, recently on Land.com. The total of all Union County farms and rural real estate for sale was nearly 1,000 acres. Union County ranks 60th out of 67 counties in the Independence State for the total number of acres of land currently advertised for sale. Among cities in Union County with farms and rural real estate for sale, Lewisburg featured the most land for sale. From an economic perspective, government and state-level services contribute most to Union County's overall GDP. Union County is the 64th largest county (317 square miles) in Pennsylvania. It's located in the Alleghenies & Valleys Pennsylvania region of the state.