Braintree, Massachusetts, United States [CDP]; population was 33,836 in 1990; housing units was 12,171 in 1990; location is 42°12'N 71°0'W; land area is 13.89 square miles (8,888 acres); water area is 0.63 square miles (402 acres); FIPS code is 7700 [SourceCBP]