Massapequa, New York, United States [CDP]; population was 22,018 in 1990; housing units was 7,225 in 1990; location is 40°40'N 73°28'W; land area is 3.63 square miles (2,326 acres); water area is 0.37 square miles (238 acres); FIPS code is 45986 [SourceCBP]