A total of almost 1,000 acres were listed for sale in Nantucket County recently; the value of all Nantucket County farmsand rural real estate for sale was $90 million. Nantucket County ranks 13th in the Colony State for the total number of acres of land currently advertised for sale. Of all locations in Nantucket County with land and rural real estate for sale, Nantucket had the most land for sale. Nantucket County is the 13th biggest county (303 square miles) in Massachusetts. It's located in the Southeast Massachusetts region of the state.