Fastest Growing Counties in Alaska (2025)

County
Rank
Change (2020) ↓
2025 Pop.
2020 Pop.
Matanuska-Susitna Borough110.48%118,773107,504
Copper River Census Area27.27%2,8042,614
Kenai Peninsula Borough35.95%62,44758,942
Southeast Fairbanks Census Area45.54%7,1996,821
Petersburg Borough54.06%3,5413,403
Aleutians East Borough62.8%3,5233,427
Aleutians West Census Area71.65%5,3005,214
Yakutat City and Borough81.32%691682
Prince of Wales-Hyder Census Area90.82%5,7885,741
Haines Borough10-0.67%2,0702,084
Denali Borough11-0.74%1,6021,614
Fairbanks North Star Borough12-1.28%94,11695,337
Ketchikan Gateway Borough13-1.76%13,67013,915
Anchorage Municipality14-2.28%284,259290,893
Bethel Census Area15-2.72%18,15418,661
Juneau City and Borough16-3.18%31,18532,209
Nome Census Area17-3.21%9,70710,029
Sitka City and Borough18-3.39%8,1408,426
Wrangell City and Borough19-3.57%2,0502,126
Bristol Bay Borough20-4.58%792830
Kodiak Island Borough21-4.83%12,41713,047
Yukon-Koyukuk Census Area22-4.9%5,0495,309
Hoonah-Angoon Census Area23-5.51%2,2282,358
North Slope Borough24-7.42%10,18711,004
Northwest Arctic Borough25-7.95%7,1777,797
Chugach Census Area26-8.06%6,5097,080
Kusilvak Census Area27-9.51%7,5758,371
Dillingham Census Area28-9.61%4,3734,838
Skagway Municipality29-11.07%1,1011,238
Lake and Peninsula Borough30-14.55%1,2391,450

Alaska County Growth Overview

Alaska's counties show varied growth patterns from 2020 to 2025. Matanuska-Susitna Borough leads with 10.48% annualized growth, followed by Copper River Census Area (7.27%) and Kenai Peninsula Borough (5.95%). The largest counties are Anchorage Municipality (284,259), Matanuska-Susitna Borough (118,773), and Fairbanks North Star Borough (94,116). Of the 30 counties in Alaska, 9 are growing while 21 have experienced population decline. Overall, counties averaged -2.36% annualized growth, with total population growing by 0.1% annually.