East Islip, New York, United States [CDP]; population was 14,325 in 1990; housing units was 4,670 in 1990; location is 40°44'N 73°11'W; land area is 4.23 square miles (2,705 acres); water area is 0.25 square miles (161 acres); FIPS code is 22315 [SourceCBP]