What are the largest counties in Alaska?

Anchorage Municipality is the largest county in Alaska, with 287,155 residents in 2025 (Census PEP). Matanuska-Susitna Borough (118,666) and Fairbanks North Star Borough (93,972) come next.

Data as of 2025 · updated November 5, 2026

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All 28 ranked Alaska counties

Alaska counties ranked by population
Rank	County	Residents 2025	Change 2020–25
1	Anchorage Municipality	287,155	−1.3%
2	Matanuska-Susitna Borough	118,666	+10.4%
3	Fairbanks North Star Borough	93,972	−1.4%
4	Kenai Peninsula Borough	61,951	+5.1%
5	Juneau City and Borough	31,609	−1.8%
6	Bethel Census Area	18,391	−1.5%
7	Ketchikan Gateway Borough	13,549	−2.6%
8	Kodiak Island Borough	12,387	−5.1%
9	North Slope Borough	10,582	−3.8%
10	Nome Census Area	9,830	−1.9%
11	Sitka City and Borough	8,319	−1.3%
12	Kusilvak Census Area	7,932	−5.2%
13	Southeast Fairbanks Census Area	7,270	+6.5%
14	Northwest Arctic Borough	7,095	−9.0%
15	Chugach Census Area	6,553	−7.5%
16	Prince of Wales-Hyder Census Area	5,777	+0.6%
17	Aleutians West Census Area	5,240	+1.2%
18	Yukon-Koyukuk Census Area	5,028	−5.1%
19	Dillingham Census Area	4,483	−7.4%
20	Aleutians East Borough	3,479	+1.6%
21	Petersburg Borough	3,394	−0.1%
22	Copper River Census Area	2,666	+1.9%
23	Hoonah-Angoon Census Area	2,271	−3.9%
24	Haines Borough	2,068	−1.0%
25	Wrangell City and Borough	2,007	−5.6%
26	Denali Borough	1,616	+0.2%
27	Lake and Peninsula Borough	1,357	−6.2%
28	Skagway Municipality	1,104	−10.8%

How this is ranked

The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Counties with fewer than 1,000 residents are not ranked. Areas without an estimate for the same year as the others are not ranked.

Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025). Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how ranks and figures are built.

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Questions

What is the largest county in Alaska?

Anchorage Municipality is the largest county in Alaska, with 287,155 residents in 2025 (Census PEP). Matanuska-Susitna Borough (118,666) and Fairbanks North Star Borough (93,972) come next.

How is this ranking calculated?

More rankings for Alaska

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