Maine Counties by Population (2025)
2025 Pop.
20K
40K
60K
80K
100K
120K
140K
160K
180K
200K
220K
240K
260K
280K
300K
Top 5 Most Populous Counties
316,360
221,169
157,351
128,986
116,067
16 Counties
| County | 2025 Pop. ↓ | Area (mi²) | Density | Change (2020) |
|---|---|---|---|---|
| Cumberland County | 316,360 | 836 | 378 | 4.2% |
| York County | 221,169 | 991 | 223 | 4.2% |
| Penobscot County | 157,351 | 3.4K | 46 | 3.4% |
| Kennebec County | 128,986 | 867 | 149 | 3.42% |
| Androscoggin County | 116,067 | 468 | 248 | 4.4% |
| Aroostook County | 66,403 | 6.7K | 10 | -0.97% |
| Oxford County | 59,963 | 2.1K | 29 | 3.58% |
| Hancock County | 57,091 | 1.6K | 36 | 2.84% |
| Somerset County | 51,505 | 3.9K | 13 | 2.04% |
| Knox County | 40,918 | 365 | 112 | 0.63% |
| Waldo County | 40,744 | 730 | 56 | 2.72% |
| Sagadahoc County | 37,623 | 254 | 148 | 2.43% |
| Lincoln County | 36,522 | 456 | 80 | 3.59% |
| Washington County | 31,320 | 2.6K | 12 | 0.68% |
| Franklin County | 30,978 | 1.7K | 18 | 5.12% |
| Piscataquis County | 17,378 | 4K | 4 | 3.43% |
Overview of Maine Counties
There are 16 counties in Maine.
Cumberland County is the largest county in the state, with a population of 316,360. The most recent census shows that its population has increased by 0.04% 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 : 221,169
- Penobscot County : 157,351
Maine Counties with the Fewest Residents
The smallest county in Maine is Piscataquis County , with a population of just 17,378. This total represents a increase of 0.0% since the last census count was performed.
Other small counties include:
- Franklin County : 30,978
- Washington County : 31,320
- Lincoln County : 36,522
Maine Counties with Rapid Growth
Franklin County , with its current population of 30,978, has shown the largest population growth, with an increase of 0.1% since the last census.
On the other hand, Aroostook County has had the largest decrease in population, with its 66,403 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)