The value of all land and rural real estate for sale in Suffolk County recently was around $6 million, representing a combined 233,904 acres of land for sale in Suffolk County. Based on the combined acreage of land and rural property for sale here, Suffolk County has the most land for sale of the 14 counties in Massachusetts. Among cities in Suffolk County with farms and rural real estate for sale, Boston had the most land for sale. Suffolk County is Massachusetts's 14th biggest county (120 square miles). It's located in the Northeast Massachusetts region of the state.