Kenai Peninsula Borough, Alaska

Kenai Peninsula Borough
Left to right, from top: Overhead view of Homer and Kachemak Bay, sunrise on Kachemak Bay, view of Kenai Lake, the Coral Seymour Memorial Ballpark, view of Mount Alice at Seward, view of the Kenai Mountains
Location within the U.S. state of Alaska
Alaska's location within the U.S.
Coordinates: 60°25′00″N 151°15′00″W / 60.416666666667°N 151.25°W / 60.416666666667; -151.25
Country United States
State Alaska
IncorporatedJanuary 1, 1964
Named afterKenai Peninsula
SeatSoldotna
Largest cityKalifornsky
Area
  Total
24,752 sq mi (64,110 km2)
  Land16,075 sq mi (41,630 km2)
  Water8,677 sq mi (22,470 km2)  35.1%
Population
 (2020)
  Total
58,799
  Estimate 
(2024)
61,259
  Density2.4/sq mi (0.92/km2)
Time zoneUTC−9 (Alaska)
  Summer (DST)UTC−8 (ADT)
Congressional districtAt-large
Websitewww.kpb.us

Kenai Peninsula Borough is a borough of the U.S. state of Alaska. As of the 2020 census, the population was 58,799, up from 55,400 in 2010. The borough seat is Soldotna, the largest city is Kenai, and the most populated community is the census-designated place of Kalifornsky.

The borough includes most of the Kenai Peninsula and a large area of the mainland of Alaska on the opposite side of Cook Inlet.