Gustavus is a second-class city in Hoonah-Angoon Census Area in the U.S. state of Alaska. The 2020 census population was 655, which represents a 48% increase over the 2010 census of 442 and is one of the fastest growing communities in Alaska.

Hoonah–Angoon Census Area is a census area located in the U.S. state of Alaska. As of the 2020 census, the population was 2,365, up from 2,150 in 2010. It is part of the unorganized borough and therefore has no borough seat. Its largest community is the city of Hoonah.