There was a combined approximately $122 million of land for sale in Nantucket County, Massachusetts, recently on Land.com. The total acreage of all Nantucket County farms and rural land for sale was 1,000 acres. Nantucket County ranks 13th in Massachusetts for the total number of acres of land currently advertised 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.