Data / Rankings / Population / Counties in Maine

Counties in Maine by population

Cumberland County had the highest population of 16 counties in 2024, at 314,665. Piscataquis County had the lowest, at 17,463. The median was 54,310 and the figure for Maine was 1.41 million. Source: the U.S. Census Bureau.

Highest314,665Cumberland County
Lowest17,463Piscataquis County
Median54,31016 counties
Maine1,408,438History

All counties, 2024

CSVChart (SVG)

Cumberland CountyCumberland County: 314,665 persons314,665York CountyYork County: 221,106 persons221,106Penobscot CountyPenobscot County: 157,283 persons157,283Kennebec CountyKennebec County: 128,672 persons128,672Androscoggin CountyAndroscoggin County: 115,600 persons115,600Aroostook CountyAroostook County: 66,925 persons66,925Oxford CountyOxford County: 59,970 persons59,970Hancock CountyHancock County: 57,130 persons57,130Somerset CountySomerset County: 51,490 persons51,490Knox CountyKnox County: 40,964 persons40,964Waldo CountyWaldo County: 40,611 persons40,611Sagadahoc CountySagadahoc County: 37,694 persons37,694Lincoln CountyLincoln County: 36,524 persons36,524Washington CountyWashington County: 31,466 persons31,466Franklin CountyFranklin County: 30,875 persons30,875Piscataquis CountyPiscataquis County: 17,463 persons17,463
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2024
persons		Change on 2023
1Cumberland County314,665+1%
2York County221,106+0.6%
3Penobscot County157,283+0.3%
4Kennebec County128,672+0.3%
5Androscoggin County115,600+0.9%
6Aroostook County66,925-0.6%
7Oxford County59,970-0.2%
8Hancock County57,130+0.5%
9Somerset County51,490+0.4%
10Knox County40,964-0.3%
11Waldo County40,611+0.3%
12Sagadahoc County37,694+0.3%
13Lincoln County36,524+0.3%
14Washington County31,466-0%
15Franklin County30,875+0.3%
16Piscataquis County17,463-0.1%

Other periods

About this ranking

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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Questions

Which county has the highest population?

Cumberland County, with 314,665 in 2024, according to the U.S. Census Bureau.

Which county has the lowest population?

Piscataquis County, with 17,463 in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved 2026-10-08.

Population: other rankings

Counties in Maine: more rankings