Schofield Barracks, Hawaii, United States [CDP]; population was 19,597 in 1990; housing units was 3,556 in 1990; location is 21°30'N 158°4'W; land area is 2.75 square miles (1,758 acres); water area is 0.00 square miles (0 acres); FIPS code is 69050 [SourceCBP]