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What are the fastest-growing counties in Maine?

York County (+4.8%), Androscoggin County (+4.8%) and Franklin County (+4.6%) grew fastest in Maine between 2020 and 2025.

Maine as a whole grew 3.7% between 2020 and 2025, to 1,414,874 residents.

Data as of 2025 · updated

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All 16 Maine counties ranked

Maine counties by population growth
RankCountyResidents 2025Change 2020–25Net migration per 1,000, 2025New homes per 1,000, 2025
1York County222,434+4.8%6.86.6
2Androscoggin County116,487+4.8%3.33.9
3Franklin County30,824+4.6%2.76.0
4Cumberland County317,222+4.5%2.55.5
5Oxford County60,346+4.2%11.87.8
6Lincoln County36,595+3.8%6.34.9
7Penobscot County157,967+3.8%6.33.1
8Piscataquis County17,409+3.5%5.78.0
9Kennebec County129,067+3.5%5.64.0
10Sagadahoc County37,979+3.4%8.76.8
11Hancock County57,171+3.0%3.05.6
12Waldo County40,693+2.6%6.64.1
13Somerset County51,620+2.3%7.92.1
14Knox County41,117+1.1%10.44.6
15Washington County31,334+0.8%2.93.4
16Aroostook County66,609−0.7%2.51.0

Ranked by the change in Census Bureau population estimates, 2020–2025.

Statewide totals

More county rankings for Maine

Metro areas

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Questions

Is Maine growing?

Maine as a whole grew 3.7% between 2020 and 2025, to 1,414,874 residents. Statewide figures add up its counties.

What is the fastest-growing county in Maine?

York County, which grew 4.8% between 2020 and 2025 to 222,434 residents (Census Bureau population estimates). Androscoggin County (+4.8%) and Franklin County (+4.6%) came next.

Which Maine counties are losing population?

1 of the 16 ranked counties had fewer residents in 2025 than in 2020. The steepest declines: Aroostook County (−0.7%).

Where are people moving in Maine?

For their size, Oxford County (11.8 per 1,000 residents), Knox County (10.4 per 1,000 residents) and Sagadahoc County (8.7 per 1,000 residents) drew the most net domestic migration (people moving in from other U.S. counties minus people moving out) in 2025.

Fastest-growing counties in other states

Across the U.S.

Sources and method

Each number shows its own period. Changes compare the latest period with five years earlier (or the earliest period available). Beacon CRE last refreshed these figures on 2026-11-05. Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how we compute every number. More on every layer: data sources and licences.