Kahuku is a census-designated place (CDP) in the Koolauloa District on the island of Oahu, County of Honolulu, Hawaii, United States. In the Hawaiian language, ka huku means “the projection”, presumably a reference to Kahuku Point nearby, the northernmost point of land on the island of Oahu. As of the 2010 Census, Kahuku had a population of 2,614.
Kahuku is located at 21°40′49″N 157°57′1″W / 21.68028°N 157.95028°W / 21.68028; -157.95028. This community is located northwest from Laie and east from Kuilima and Kawela Bay along Kamehameha Highway (Route 83).
According to the United States Census Bureau, the CDP has a total area of 2.3 square miles (6.0 km), of which 1.0 square mile (2.6 km) is land and 1.3 square miles (3.4 km) is water. The total area is 57.46% water, the Pacific Ocean lying off the coast in the census tract.
As of the census of 2000, there were 2,097 people, 509 households, and 401 families residing in the CDP. The population density was 2,150.9 people per square mile (834.7/km²). There were 518 housing units at an average density of 531.3 per square mile (206.2/km²). The racial makeup of the CDP was 11.06% White, 0.29% Black or African American, 0.14% Native American, 26.85% Asian, 27.28% Pacific Islander, 1.05% from other races, and 33.33% from two or more races. 8.63% of the population were Hispanic or Latino of any race.
There were 509 households out of which 43.2% have children under the age of 18 living with them, 59.3% are married couples living together, 14.3% had a female householder with no husband present, and 21.2% were non-families. 19.8% of all households were made up of individuals and 11.0% had someone living alone who was 65 years of age or older. The average household size was 3.96 and the average family size was 4.63.
In the CDP the population was spread out with 35.4% under the age of 18, 10.7% from 18 to 24, 23.3% from 25 to 44, 17.8% from 45 to 64, and 12.7% who were 65 years of age or older. The median age was 28 years. For every 100 females, there were 101.2 males. For every 100 females age 18 and over, there were 96.9 males.
The median income for a household in the CDP was $39,135, and the median income for a family was $47,045. Males had a median income of $29,934 versus $22,366 for females. The per capita income for the CDP was $12,340. 14.6% of the population and 11.8% of families were below the poverty line. Out of the total population, 17.4% of those under the age of 18 and 17.7% of those 65 and older were living below the poverty line.