Data / Rankings / Population / Counties in Maine

Counties in Maine by population

Cumberland County had the highest population of 16 counties in 2023, at 311,645. Piscataquis County had the lowest, at 17,474. The median was 54,079 and the figure for Maine was 1.4 million. Source: the U.S. Census Bureau.

Highest311,645Cumberland County
Lowest17,474Piscataquis County
Median54,07916 counties
Maine1,401,992History

All counties, 2023

CSVChart (SVG)

Cumberland CountyCumberland County: 311,645 persons311,645York CountyYork County: 219,839 persons219,839Penobscot CountyPenobscot County: 156,839 persons156,839Kennebec CountyKennebec County: 128,254 persons128,254Androscoggin CountyAndroscoggin County: 114,587 persons114,587Aroostook CountyAroostook County: 67,330 persons67,330Oxford CountyOxford County: 60,076 persons60,076Hancock CountyHancock County: 56,865 persons56,865Somerset CountySomerset County: 51,293 persons51,293Knox CountyKnox County: 41,077 persons41,077Waldo CountyWaldo County: 40,475 persons40,475Sagadahoc CountySagadahoc County: 37,576 persons37,576Lincoln CountyLincoln County: 36,418 persons36,418Washington CountyWashington County: 31,471 persons31,471Franklin CountyFranklin County: 30,773 persons30,773Piscataquis CountyPiscataquis County: 17,474 persons17,474
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2023
persons		Change on 2022
1Cumberland County311,645+0.7%
2York County219,839+1.1%
3Penobscot County156,839+1.2%
4Kennebec County128,254+0.8%
5Androscoggin County114,587+1%
6Aroostook County67,330+0.1%
7Oxford County60,076+0.9%
8Hancock County56,865+0.4%
9Somerset County51,293+0.5%
10Knox County41,077-0.5%
11Waldo County40,475+0.7%
12Sagadahoc County37,576+0.4%
13Lincoln County36,418+0.5%
14Washington County31,471-0%
15Franklin County30,773+0.7%
16Piscataquis County17,474+0.5%

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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Rank Counties in Maine by population using official data, and cite the source.
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Questions

Which county has the highest population?

Cumberland County, with 311,645 in 2023, according to the U.S. Census Bureau.

Which county has the lowest population?

Piscataquis County, with 17,474 in 2023.

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