Wailua, HI -- U.S. Census Designated Place in Hawaii Population (2000): 2083 Housing Units (2000): 1211 Land area (2000): 1.286906 sq. miles (3.333072 sq. km) Water area (2000): 0.143269 sq. miles (0.371065 sq. km) Total area (2000): 1.430175 sq. miles (3.704137 sq. km) FIPS code: 77000 Located within: Hawaii (HI), FIPS 15 Location: 22.058631 N, 159.341761 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Wailua, HI Wailua