Kualapuu, Hawaii, United States [CDP]; population was 1,661 in 1990; housing units was 493 in 1990; location is 21°10'N 157°4'W; land area is 30.46 square miles (19,497 acres); water area is 0.23 square miles (150 acres); FIPS code is 39500 [SourceCBP]