The value of land for sale in Phelps County recently on Land.com was almost $130 million. This represents nearly 7,000 acres of farms, ranches, hunting land and other land for sale in Phelps County. Phelps County ranks 31st in the Show Me State for the combined amount of land currently advertised for sale. Among cities in Phelps County with land and rural real estate for sale, Rolla had the most land for sale. From an economic perspective, government and state-level services contribute most to Phelps County's overall GDP. Phelps County is the 39th largest county (674 square miles) in Missouri. It's located in the Southeast Missouri region of the state.