Of 16 counties in the Vacationland, 4,093-square-mile Somerset County ranks third by size. Somerset County is in the Northwest Maine region. Somerset County, Maine, has roughly 3,000 acres of residential land and property for sale based on recent Land Network data. The combined market value of farms and rural land for sale here was $57 million. The average price of residential land for sale in Somerset County was $331,028. Browse all residential land and rural property for sale in Maine to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.