| County: | Lake and Peninsula Borough |
| State: | Alaska |
| Seal: | Lake and Peninsula Borough, Alaska seal.jpg |
| Founded Year: | 1989[1] [2] |
| Founded Date: | April 24 |
| Leader Name: | Glen R. Alsworth, Sr. |
| Leader Title: | Mayor |
| Seat Wl: | King Salmon |
| Largest City Wl: | Port Alsworth |
| City Type: | CDP |
| Area Total Sq Mi: | 32922 |
| Area Land Sq Mi: | 23652 |
| Area Water Sq Mi: | 9270 |
| Area Percentage: | 28.2% |
| Population As Of: | 2020 |
| Population Total: | 1381 |
| Population Density Sq Mi: | auto |
| Web: | www.lakeandpen.com |
| District: | At-large |
| Time Zone: | Alaska |
Lake and Peninsula Borough (Russian: Лейк-энд-Пенинсула, Leyk-end-Peninsula) is a borough in the state of Alaska. As of the 2020 census, the population was 1,476,[3] down from 1,631 in 2010.[4] The borough seat of King Salmon[5] is located in neighboring Bristol Bay Borough, although is not the seat of that borough. The most populous community in the borough is the census-designated place of Port Alsworth. With an average of 0.017/km2, the Lake and Peninsula Borough is the second least densely populated organized county-equivalent in the United States; only the unorganized Yukon-Koyukuk Census Area has a lower density.
The borough has an area of, of which is land and (28.2%) is water.[6] The borough contains Iliamna Lake, the largest lake in Alaska and third largest within United States borders, and occupies most of the Alaska Peninsula. Its land area is larger than that of San Bernardino County, California, the largest county in the contiguous Lower 48 states.
As of the census[7] of 2000, there were 1,823 people, 588 households, and 418 families residing in the borough. The population density was 0.059/mi2. There were 1,557 housing units at an average density of 0.05/mi2. The racial makeup of the borough was 18.76% White, 0.05% Black or African American, 73.51% Native American, 0.22% Asian, 0.16% Pacific Islander, 0.33% from other races, and 6.97% from two or more races. 1.15% of the population were Hispanic or Latino of any race. About 5.41% reported speaking a Yupik language at home, while 3.87% speak Alutiiq and 1.23% an Athabaskan language.[8]
Some 44.70% of households had children under the age of 18 living with them, 48.50% were married couples living together, 9.70% had a female householder with no husband present, and 28.90% were non-families. About 24.70% of all households were made up of individuals, and 3.90% consisted of a sole occupant 65 years of age or older. The average household size was 3.10 and the average family size was 3.74.
In the borough, the age of the population was spread out, with 37.80% under the age of 18, 8.50% from 18 to 24, 28.00% from 25 to 44, 20.20% from 45 to 64, and 5.40% who were 65 years of age or older. The median age was 29 years. For every 100 females, there were 113.50 males. For every 100 females age 18 and over, there were 124.10 males.
The dominant religion is Orthodox Christianity.
The Borough is governed by an elected assembly. The Borough's mayor is Glen R. Alsworth, Sr. The deputy mayor is Myra J. Olsen. The other members of the assembly are Randy Alvarez, Scott Anderson, Alvin Pedersen, Michelle Pope-Ravenmoon, and Christina Salmon-Bringhurst.[9]