Marstons Mills, Massachusetts, United States [CDP]; population was 8,017 in 1990; housing units was 3,538 in 1990; location is 41°40'N 70°24'W; land area is 13.51 square miles (8,644 acres); water area is 1.02 square miles (650 acres); FIPS code is 38995 [SourceCBP]