Wailua Homesteads, Hawaii, United States [CDP]; population was 3,870 in 1990; housing units was 1,299 in 1990; location is 22°4'N 159°23'W; land area is 7.04 square miles (4,506 acres); water area is 0.09 square miles (61 acres); FIPS code is 77150 [SourceCBP]