Wyandanch, New York, United States [CDP]; population was 8,950 in 1990; housing units was 2,362 in 1990; location is 40°45'N 73°23'W; land area is 4.42 square miles (2,830 acres); water area is 0.00 square miles (2 acres); FIPS code is 83294 [SourceCBP]