Latitude and Longitude:
|• Total||2.3 sq mi (5.9 km2)|
|• Land||1.0 sq mi (2.5 km2)|
|• Water||1.3 sq mi (3.4 km2)|
|Elevation||15 ft (5 m)|
|• Density||1,100/sq mi (440/km2)|
|Time zone||UTC−10:00 ( Hawaii-Aleutian)|
|GNIS feature ID||0359833|
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. 
According to the United States Census Bureau, the CDP has a total area of 2.3 square miles (6.0 km2), of which 1.0 square mile (2.6 km2) is land and 1.3 square miles (3.4 km2) 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% had children under the age of 18 living with them, 59.3% were 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.
The ZIP Code for Kahuku is 96731. In the mid-1970s a popular television game show, The Diamond Head Game, was contested on the grounds of Del Webb's Kuilima Hotel (today the Turtle Bay Resort), located just to the west. At the end of each show the announcer would say, "If you plan to be in Hawaii, send a self-addressed, stamped envelope to the Diamond Head Game, Kahuku, Oahu 96731." The Fox TV series North Shore was filmed there in 2004. 
Kahuku is also home to one of the few remaining family-owned farms in the area: Kahuku Farms. Educational tours are given several times a week, though private tours can be scheduled in advance. The farm also runs a small farm-to-table cafe.  
Many of the people in the Kahuku community and in the football community have Samoan or Tongan roots  and high school football has become quite important to them. Kahuku High School in this small, rural, coastal town on the North Shore of Oahu has produced some of the best football players in the United States. The players are regularly scouted by American colleges and universities.   Many end up playing professionally for the National Football League. 
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"2010 CENSUS - CENSUS BLOCK MAP: Kahuku CDP, HI" (PDF).
U.S. Census Bureau. Retrieved 2020-10-10.
2000 Map: "CENSUS 2000 BLOCK MAP: KAHUKU CDP" (PDF). U.S. Census Bureau. Retrieved 2020-10-10.