According to the United States Census Bureau, the CDP has a total area of 23.8 km² (9.2 mi²). 23.3 km² (9.0 mi²) of it is land and 0.5 km² (0.2 mi²) of it (2.18%) is water.
As of the census of 2000, there were 8,197 people, 1,408 households, and 1,375 families residing in the CDP. The population density was 352.0/km² (911.7/mi²). There were 1,502 housing units at an average density of 64.5/km² (167.1/mi²). The racial makeup of the CDP was 67.10% White, 10.60% African American, 1.61% Native American, 2.82% Asian, 0.34% Pacific Islander, 12.89% from other races, and 4.64% from two or more races. Hispanic or Latino of any race were 22.62% of the population.
There were 1,408 households out of which 71.9% had children under the age of 18 living with them, 90.3% were married couples living together, 5.4% had a female householder with no husband present, and 2.3% were non-families. 1.7% of all households were made up of individuals and none had someone living alone who was 65 years of age or older. The average household size was 3.15 and the average family size was 3.15.
In the CDP the population was spread out with 20.1% under the age of 18, 60.2% from 18 to 24, 18.5% from 25 to 44, and 1.2% from 45 to 64. The median age was 21 years. For every 100 females there were 226.8 males. For every 100 females age 18 and over, there were 294.9 males.
The median income for a household in the CDP was $28,558, and the median income for a family was $28,942. Males had a median income of $14,486 versus $16,907 for females. The per capita income for the CDP was $13,085. About 8.6% of families and 9.7% of the population were below the poverty line, including 12.4% of those under age 18 and none of those age 65 or over.
In the state legislature Camp Pendleton North is located in the 38th Senate District, represented by Republican Mark Wyland, and in the 73rd Assembly District, represented by Republican Mimi Walters. Federally, Camp Pendleton North is located in California's 49th congressional district, which has a Cook PVI of R +10 and is represented by Republican Darrell Issa.