Old Bethpage, New York, United States [CDP]; population was 5,610 in 1990; housing units was 1,862 in 1990; location is 40°45'N 73°27'W; land area is 4.09 square miles (2,620 acres); water area is 0.00 square miles (2 acres); FIPS code is 54551 [SourceCBP]