Data / Rankings / Population density / Counties in Maine

Counties in Maine by population density, 2025

Cumberland County had the highest population density of 16 counties in 2025, at 146.5 inhabitants per km². Piscataquis County had the lowest, at 1.7 inhabitants per km². The median was 19.7 inhabitants per km² and the figure for Maine was 17.7 inhabitants per km². Source: the U.S. Census Bureau.

Highest146.5Cumberland County
Lowest1.7Piscataquis County
Median19.716 counties
Maine17.7History

All counties, 2025

CSVChart (SVG)

Cumberland CountyCumberland County: 146.5 inhabitants per km²146.5Androscoggin CountyAndroscoggin County: 96.1 inhabitants per km²96.1York CountyYork County: 86.6 inhabitants per km²86.6Sagadahoc CountySagadahoc County: 57.7 inhabitants per km²57.7Kennebec CountyKennebec County: 57.4 inhabitants per km²57.4Knox CountyKnox County: 43.5 inhabitants per km²43.5Lincoln CountyLincoln County: 31 inhabitants per km²31Waldo CountyWaldo County: 21.5 inhabitants per km²21.5Penobscot CountyPenobscot County: 18 inhabitants per km²18Hancock CountyHancock County: 13.9 inhabitants per km²13.9Oxford CountyOxford County: 11.2 inhabitants per km²11.2Franklin CountyFranklin County: 7 inhabitants per km²7Somerset CountySomerset County: 5.1 inhabitants per km²5.1Washington CountyWashington County: 4.7 inhabitants per km²4.7Aroostook CountyAroostook County: 3.9 inhabitants per km²3.9Piscataquis CountyPiscataquis County: 1.7 inhabitants per km²1.7
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2025
inhabitants per km²		Change on 2024
1Cumberland County146.5+0.8%
2Androscoggin County96.1+0.8%
3York County86.6+0.6%
4Sagadahoc County57.7+0.8%
5Kennebec County57.4+0.3%
6Knox County43.5+0.4%
7Lincoln County31+0.2%
8Waldo County21.5+0.2%
9Penobscot County18+0.4%
10Hancock County13.9+0.1%
11Oxford County11.2+0.6%
12Franklin County7-0.2%
13Somerset County5.1+0.3%
14Washington County4.7-0.4%
15Aroostook County3.9-0.5%
16Piscataquis County1.7-0.3%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

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. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

Which county has the highest population density?

Cumberland County, with 146.5 inhabitants per km² in 2025, according to the U.S. Census Bureau.

Which county has the lowest population density?

Piscataquis County, with 1.7 inhabitants per km² in 2025.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

Counties in Maine: more rankings