Waimanalo Beach, Hawaii, United States [CDP]; population was 4,185 in 1990; housing units was 965 in 1990; location is 21°20'N 157°41'W; land area is 1.63 square miles (1,044 acres); water area is 1.42 square miles (910 acres); FIPS code is 78200 [SourceCBP]