Mililani Town, Hawaii, United States [CDP]; population was 29,359 in 1990; housing units was 8,900 in 1990; location is 21°27'N 158°1'W; land area is 3.91 square miles (2,503 acres); water area is 0.02 square miles (13 acres); FIPS code is 51050 [SourceCBP]