Petersburg, Alaska

Petersburg, Alaska
Aerial view of Petersburg
Motto: 
Little Norway. Big Adventure.
Location of Petersburg in Alaska
Coordinates: 56°48′16″N 132°56′31″W / 56.80444°N 132.94194°W / 56.80444; -132.94194
CountryUnited States
StateAlaska
BoroughPetersburg
Area
  Total
46.30 sq mi (119.93 km2)
  Land44.17 sq mi (114.40 km2)
  Water2.14 sq mi (5.53 km2)
Population
 (2020)
  Total
3,043
  Density68.89/sq mi (26.60/km2)
ZIP code
99833
Area code907
FIPS code02-60310

Petersburg is a census-designated place (CDP) in and essentially the borough seat of Petersburg Borough, Alaska, United States. The population was 3,043 at the 2020 census, up from 2,948 in 2010.

The borough encompasses Petersburg and Kupreanof, plus mostly uninhabited areas stretching to the Canadian–American border and the southern boundary of the City and Borough of Juneau. While the city of Petersburg ceased to exist as a separate administrative entity (the borough assembly created a service area to assume operation of the former city's services), the tiny city of Kupreanof remains separate within the borough.