The North Slope Borough is the northernmost borough in the US state of Alaska. The borough seat and largest city is Utqiagvik, which is also the northernmost settlement in the United States.
According to the U.S. Census Bureau, the borough has a total area of 94,796 square miles (245,520 km), of which 88,695 square miles (229,720 km) is land and 6,101 square miles (15,800 km) (6.4%) is water. The borough is larger than 39 states.
Its western coastline is along the Chukchi Sea, while its eastern shores (beyond Point Barrow) are on the Beaufort Sea.
The North Slope Borough is the largest county-level political subdivision in the United States by area, with a larger land area than that of the state of Utah (Utah is the 13th-largest state in the nation). Although the adjacent Yukon-Koyukuk Census Area is larger in area, it has no borough-level government. The borough is the fourth-least densely populated county-level entity in the United States. The Yukon-Koyukuk Census Area is the least densely populated county-level entity).
As of the census of 2010, there were 9,430 people, 2,109 households, and 1,524 families residing in the borough. The population density was 12.03 square miles (31.2 km) per person. There were 2,538 housing units at an average density of 35 square miles (91 km) per unit. The racial makeup of the borough was 17.09% White, 0.72% Black or African American, 68.38% Native American, mostly Inuit, 5.92% Asian, 0.84% Pacific Islander, 0.50% from other races, and 6.55% from two or more races. 2.37% of the population was Hispanic or Latino of any race. 42.84% reported speaking Iñupiaq or “Eskimo” at home, while 4.21% reported speaking Tagalog.
There were 2,109 households out of which 48.10% had children under the age of 18 living with them, 43.3% were married couples living together, 18.3% had a female householder with no husband present, and 27.70% were non-families. 21.4% of all households were made up of individuals and 1.9% had someone living alone who was 65 years of age or older. The average household size was 3.45 and the average family size was 4.05.
In the borough, the population was spread out with 38.2% under the age of 18, 9.50% from 18 to 24, 30.1% from 25 to 44, 18.10% from 45 to 64, and 4.2% who were 65 years of age or older. The median age was 27 years. For every 100 females, there were 112.50 males. For every 100 females age 18 and over, there were 113.90 males.