Maine Counties by Population (2026)
2026 Pop.
20K
40K
60K
80K
100K
120K
140K
160K
180K
200K
220K
240K
260K
280K
300K
Top 5 Most Populous Counties
319,779
223,762
158,651
129,462
117,374
| County | 2026 Pop. ↓ | Area (mi²) | Density (/mi²) | Change (2020) |
|---|---|---|---|---|
| Cumberland County | 319,779 | 836 | 383 | 5.33% |
| York County | 223,762 | 991 | 226 | 5.41% |
| Penobscot County | 158,651 | 3.4K | 47 | 4.26% |
| Kennebec County | 129,462 | 867 | 149 | 3.79% |
| Androscoggin County | 117,374 | 468 | 251 | 5.57% |
| Aroostook County | 66,293 | 6.7K | 9.9 | -1.13% |
| Oxford County | 60,722 | 2.1K | 29 | 4.88% |
| Hancock County | 57,212 | 1.6K | 36 | 3.06% |
| Somerset County | 51,750 | 3.9K | 13 | 2.54% |
| Knox County | 41,270 | 365 | 113 | 1.49% |
| Waldo County | 40,775 | 730 | 56 | 2.8% |
| Sagadahoc County | 38,264 | 254 | 151 | 4.17% |
| Lincoln County | 36,666 | 456 | 80 | 4.03% |
| Washington County | 31,202 | 2.6K | 12 | 0.36% |
| Franklin County | 30,773 | 1.7K | 18 | 4.45% |
| Piscataquis County | 17,355 | 4K | 4.4 | 3.21% |
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)