Kupreanof is a city at the eastern shore of Kupreanof Island in the Petersburg Borough, in the U.S. state of Alaska. The population was 27 as of the 2010 census, up from 23 in 2000. It was formerly the smallest incorporated city in the state as of 2000, but is now the second smallest as of 2010, with Bettles, Alaska being the smallest, with 12 residents.
Kupreanof is located at 56°49′21″N 132°58′57″W / 56.82250°N 132.98250°W / 56.82250; -132.98250 (56.822384, -132.982506). It is across the Wrangell Narrows from Petersburg on Mitkof Island.
According to the United States Census Bureau, the city has a total area of 6.1 square miles (16 km), of which, 4.0 square miles (10 km) of it is land and 2.1 square miles (5.4 km) of it (34.32%) is water.
Kupreanof first appeared on the 1930 U.S. Census as the unincorporated village of West Petersburg, appearing under that name until the 1970 census. It formally changed its name to Kupreanof and incorporated as a city in 1975.
As of the census of 2000, there were 23 people, 12 households, and 6 families residing in the city. The population density was 5.7 people per square mile (2.2/km²). There were 26 housing units at an average density of 6.5 per square mile (2.5/km²). The racial makeup of the city was 91.30% White, 4.35% Asian, and 4.35% from two or more races.
There were 12 households out of which 16.7% had children under the age of 18 living with them, 50.0% were married couples living together, and 50.0% were non-families. 50.0% of all households were made up of individuals and 16.7% had someone living alone who was 65 years of age or older. The average household size was 1.92 and the average family size was 2.83.
In the city population was spread out with 17.4% under the age of 18, 4.3% from 18 to 24, 21.7% from 25 to 44, 47.8% from 45 to 64, and 8.7% who were 65 years of age or older. The median age was 46 years. For every 100 females, there were 91.7 males. For every 100 females age 18 and over, there were 111.1 males.
The median income for a household in the city was $45,833, and the median income for a family was $100,470. Males had a median income of $51,250 versus $0 for females. The per capita income for the city was $26,650. None of the population and none of the families were below the poverty line.
Kupreanof Alaska neighborhoods include: Anchorage, Anchor Point, Chiniak, Chugiak, Clam Gulch, Cooper Landing, Delta Junction, Douglas, Eagle River, Eielson Afb, Elmendorf Afb, Fairbanks, Fort Richardson, Girdwood, Haines, Homer, Indian, Juneau, Kasilof, Kenai, Ketchikan, Kodiak, Metlakatla, Moose Pass, Nikolaevsk, Ninilchik, North Pole, Salcha, Seward, Sitka, Soldotna, Sterling, Tyonek, Wasilla