As of the censusGR2 of 2000, there were 8,835 people, 3,278 households, and 2,219 families residing in the borough. The population density was 1.2/km² (3.1/mi²). There were 3,650 housing units at an average density of 0.5/km² (1.3/mi²).

The racial makeup of the borough was 68.50% White, 0.32% Black or African American, 18.57% Native American, 3.79% Asian, 0.35% Pacific Islander, 0.94% from other races, and 7.53% from two or more races. 3.28% of the populations were Hispanic or Latino of any race. 1.87% reported speaking Tlingit at home, while 1.62% speak Tagalog, 1.05% Spanish, and 1.00% Ilokano.

There were 3,278 households out of which 36.2% had children under the age of 18 living with them, 53.0% were married couples living together, 10.3% had a female householder with no husband present, and 32.3% were non-families. 24.5% of all households were made up of individuals and 5.4% had someone living alone who was 65 years of age or older. The average household size was 2.61 and the average family size was 3.15.

In the borough the population was spread out with 27.2% under the age of 18, 9.4% from 18 to 24, 30.9% from 25 to 44, 24.1% from 45 to 64, and 8.4% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 104.0 males. For every 100 females age 18 and over, there were 104.8 males.

The median income for a household in the borough was $51,901, and the median income for a family was $62,361. Males had a median income of $40,037 versus $30,319 for females. The per capita income for the borough was $23,622. About 4.2% of families and 7.8% of the population were below the poverty line, including 9.2% of those under age 18 and 7.2% of those ages 65 or over.