Waiʻanae is a census-designated place (CDP) in Honolulu County, Hawaii, United States. As of the 2010 Census, the CDP population was 13,177.
Its name means "waters of the mullet". Its etymology is shared with the town of Waikanae, located in New Zealand.
Waiʻanae is located at 21°26′52″N 158°10′45″W (21.447714, -158.179213).
According to the United States Census Bureau, the CDP has a total area of 7.0 square miles (18.2 km2), of which 5.4 square miles (13.9 km2) is land and 1.7 square miles (4.4 km2), or 23.92%, is water.
As of the census of 2000, there were 10,506 people, 2,595 households, and 2,221 families residing in the CDP. The population density was 3,086.0 people per square mile (1,193.1/km2). There were 2,925 housing units at an average density of 859.2 per square mile (332.2/km2). The racial makeup of the CDP was 9.35% White, 0.81% African American, 0.26% Native American, 19.44% Asian, 27.26% Pacific Islander, 0.97% from other races, and 41.92% from two or more races. Hispanic or Latino of any race were 14.00% of the population.
There were 2,595 households, out of which 43.9% had children under the age of 18 living with them, 58.0% were married couples living together, 19.6% had a female householder with no husband present, and 14.4% were non-families. 10.9% of all households were made up of individuals, and 4.1% had someone living alone who was 65 years of age or older. The average household size was 4.04 and the average family size was 4.30.