According to the U.S. Census Bureau, the census area has a total area of 147,805 square miles (382,810 km2), of which 145,505 square miles (376,860 km2) is land and 2,300 square miles (6,000 km2) (1.6%) is water. The area is roughly the same size as the U.S. state of Montana or the country of Germany. Its population density, at 0.0449 inhabitants per square mile (0.0173 /km2), is the lowest in the United States.
There were 2,309 households out of which 38.90% had children under the age of 18 living with them, 36.90% were married couples living together, 16.90% had a female householder with no husband present, and 35.90% were non-families. 30.50% of all households were made up of individuals and 6.20% had someone living alone who was 65 years of age or older. The average household size was 2.81 and the average family size was 3.53.
In the census area the population was spread out with 35.00% under the age of 18, 8.70% from 18 to 24, 26.90% from 25 to 44, 22.10% from 45 to 64, and 7.30% who were 65 years of age or older. The median age was 31 years. For every 100 females there were 118.60 males. For every 100 females age 18 and over, there were 122.60 males.