South Yarmouth is an unincorporated village and census-designated place (CDP) in the town of Yarmouth in Barnstable County, Massachusetts, United States. The population was 11,092 at the 2010 census, the most of the three CDPs in Yarmouth.GeographySouth Yarmouth is located in the southeast quarter of the town of Yarmouth at . It is bordered by the CDP of West Yarmouth to the west and West Dennis to the east. U.S. Route 6, the Mid-Cape Highway, is to the north, beyond which is the CDP of Yarmouth Port.According to the United States Census Bureau, the CDP has a total area of 20.2sqkm. 18.0sqkm of it is land, and 2.2sqkm of it is water.
