Maine Counties by Population (2025)
Top 5 Most Populous Counties
16 Counties
| County | 2025 Pop. ↓ | Area (mi²) | Density | Change (2020) |
|---|---|---|---|---|
| Cumberland County | 313,016 | 836 | 374 | 3.11% |
| York County | 221,858 | 991 | 224 | 4.52% |
| Penobscot County | 156,480 | 3,397 | 46 | 2.83% |
| Kennebec County | 128,707 | 867 | 148 | 3.2% |
| Androscoggin County | 114,845 | 468 | 245 | 3.3% |
| Aroostook County | 67,409 | 6,671 | 10 | 0.52% |
| Oxford County | 60,799 | 2,077 | 29 | 5.01% |
| Hancock County | 56,480 | 1,587 | 36 | 1.75% |
| Somerset County | 51,670 | 3,924 | 13 | 2.37% |
| Waldo County | 41,350 | 730 | 57 | 4.27% |
| Knox County | 40,573 | 365 | 111 | -0.2% |
| Sagadahoc County | 37,795 | 254 | 149 | 2.89% |
| Lincoln County | 36,951 | 456 | 81 | 4.79% |
| Washington County | 31,611 | 2,563 | 12 | 1.68% |
| Franklin County | 31,294 | 1,697 | 18 | 6.2% |
| Piscataquis County | 17,652 | 3,961 | 4 | 5.02% |
Overview of Maine Counties
There are 16 counties in Maine.
Cumberland County is the largest county in the state, with a population of 313,016. The most recent census shows that its population has increased by 0.03% since the previous census.
A number of other Maine counties also boast relatively large populations for their state, though not able to match the density of Cumberland County:
- York County : 221,858
- Penobscot County : 156,480
Maine Counties with the Fewest Residents
The smallest county in Maine is Piscataquis County, with a population of just 17,652. This total represents a increase of 0.1% since the last census count was performed.
Other small counties include:
- Franklin County : 31,294
- Washington County : 31,611
- Lincoln County : 36,951
Maine Counties with Rapid Growth
Franklin County, with its current population of 31,294, has shown the largest population growth, with an increase of 0.1% since the last census.
On the other hand, Knox County has had the largest decrease in population, with its 40,573 current residents totalling 0.0% less than the previous census.
Sources
- US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
- American Community Survey (2009 - 2013)
- Census QuickFacts
- Historical Populations of States and Counties (1790 - 1990)