King Salmon is a census-designated place (CDP) in Bristol Bay Borough in the U.S. state of Alaska. It is 284 miles (457 km) southwest of Anchorage. As of the 2020 census the population was 307, down from 374 in 2010. It is home to Katmai National Park and Preserve. King Salmon is the borough seat of neighboring Lake and Peninsula Borough, but does not serve that purpose in its own borough, whose borough seat is in Naknek.

Bristol Bay Borough is a borough of the U.S. state of Alaska on Bristol Bay. As of the 2020 census the borough population was 843, down from 997 in 2010, the second-least populated borough in Alaska. The borough seat is Naknek. There are no incorporated settlements.