What are the fastest-growing boroughs and census areas in Alaska?
Matanuska-Susitna Borough is the fastest-growing borough in Alaska: its population grew 1.99% a year from 2020 to 2025, to 118,666 residents (Census PEP Vintage 2025). Kenai Peninsula Borough (1.00%) and Anchorage Municipality (-0.26%) follow. Alaska as a whole grew 0.12% a year to 737,270 residents.
Data as of 2026-09-23. Population, growth and migration: PEP Vintage 2025 · 2020–2025. Income migration: IRS SOI 2022–2023 (2-yr lag).
Top 9 boroughs and census areas in Alaska by population growth, 2020 to 2025
| Rank | Borough or census area | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Matanuska-Susitna Borough | 118,666 | 1.99% | +8,544 | +263 | +$64.8M |
| 2 | Kenai Peninsula Borough | 61,951 | 1.00% | +2,282 | +146 | +$20.5M |
| 3 | Anchorage Municipality | 287,155 | -0.26% | -15,941 | +5,648 | -$144.5M |
| 4 | Fairbanks North Star Borough | 93,972 | -0.29% | -5,799 | +920 | -$75.4M |
| 5 | Bethel Census Area | 18,391 | -0.30% | -1,683 | +153 | -$16.2M |
| 6 | Juneau City and Borough | 31,609 | -0.37% | -1,280 | +361 | -$13.0M |
| 7 | Ketchikan Gateway Borough | 13,549 | -0.53% | -593 | +152 | -$2.8M |
| 8 | North Slope Borough | 10,582 | -0.77% | -836 | +125 | -$9.8M |
| 9 | Kodiak Island Borough | 12,387 | -1.03% | -1,371 | +413 | -$11.7M |
Where are people moving in Alaska?
Matanuska-Susitna Borough gained the most people from elsewhere in the United States: net domestic migration of +8,544 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every Alaska place with 10,000 or more residents by that figure; the IRS column shows net adjusted gross income migration for 2022 to 2023.
| Rank | Borough or census area | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Matanuska-Susitna Borough | 118,666 | 1.99% | +8,544 | +263 | +$64.8M |
| 2 | Kenai Peninsula Borough | 61,951 | 1.00% | +2,282 | +146 | +$20.5M |
| 3 | Ketchikan Gateway Borough | 13,549 | -0.53% | -593 | +152 | -$2.8M |
| 4 | North Slope Borough | 10,582 | -0.77% | -836 | +125 | -$9.8M |
| 5 | Juneau City and Borough | 31,609 | -0.37% | -1,280 | +361 | -$13.0M |
| 6 | Kodiak Island Borough | 12,387 | -1.03% | -1,371 | +413 | -$11.7M |
| 7 | Bethel Census Area | 18,391 | -0.30% | -1,683 | +153 | -$16.2M |
| 8 | Fairbanks North Star Borough | 93,972 | -0.29% | -5,799 | +920 | -$75.4M |
| 9 | Anchorage Municipality | 287,155 | -0.26% | -15,941 | +5,648 | -$144.5M |
Go past the headline numbers
The interactive Demographics map layer and the full report for a single place are part of paid plans.
Get the Demographics Report for Matanuska-Susitna BoroughFrequently asked questions
- What are the fastest-growing boroughs and census areas in Alaska?
- By population growth from 2020 to 2025, the fastest are Matanuska-Susitna Borough (1.99% a year), Kenai Peninsula Borough (1.00% a year), Anchorage Municipality (-0.26% a year), Fairbanks North Star Borough (-0.29% a year) and Bethel Census Area (-0.30% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in Alaska?
- By net domestic migration from 2020 to 2025, the largest gains are Matanuska-Susitna Borough (+8,544), Kenai Peninsula Borough (+2,282) and Ketchikan Gateway Borough (-593) (Census PEP Vintage 2025).
- How fast is Alaska growing overall?
- Alaska grew 0.12% a year from 2020 to 2025, to 737,270 residents, with net migration of -12,822 people (Census PEP Vintage 2025).
- Where does this Alaska data come from, and how current is it?
- Population, growth and migration come from the U.S. Census Bureau Population Estimates Program (PEP Vintage 2025 · 2020–2025). Income migration comes from IRS Statistics of Income (IRS SOI 2022–2023 (2-yr lag)). Boroughs and census areas with fewer than 10,000 residents are not ranked (21 of 30 in Alaska). Data last loaded 2026-09-23.
Data as of 2026-09-23: sources and periods
- Population, growth and migration
- U.S. Census Bureau, Population Estimates Program: PEP Vintage 2025 · 2020–2025. census.gov/programs-surveys/popest
- Income migration (net AGI)
- Internal Revenue Service, Statistics of Income migration data: IRS SOI 2022–2023 (2-yr lag). irs.gov/statistics/soi-tax-stats-migration-data
How to read the table
- Population is the Census July 1 estimate of the latest vintage.
- Growth is the compound annual rate over 2020 to 2025.
- Net domestic and international migration are cumulative people over 2020 to 2025.
- IRS net AGI migration is adjusted gross income that moved in, less what moved out, for 2022 to 2023. A plus sign means a net inflow.
- Places with fewer than 10,000 residents are left out of the rankings.