Land for sale in Virginia's Caroline County recently totaled almost $70 million and approximately 3,000 acres. Caroline County ranks 47th in the Old Dominion for the combined amount of land currently advertised for sale. Among cities in Caroline County with farms, hunting land and other rural land and acreage for sale, Ruther Glen had the most land for sale. Government and state-level services are the main economic drivers in Caroline County. Caroline County is the 19th biggest county (537 square miles) in Virginia. It's located in the Northern Virginia region of the state.