Mahopac, New York, United States [CDP]; population was 7,755 in 1990; housing units was 2,972 in 1990; location is 41°22'N 73°44'W; land area is 5.31 square miles (3,399 acres); water area is 1.13 square miles (721 acres); FIPS code is 44534 [SourceCBP]