Massachusetts Counties by Population (2026)
2026 Pop.
200K
400K
600K
800K
1M
1.2M
1.4M
1.6M
Top 5 Most Populous Counties
1,676,029
893,282
827,136
790,247
741,897
| County | 2026 Pop. ↓ | Area (mi²) | Density (/mi²) | Change (2020) |
|---|---|---|---|---|
| Middlesex County | 1,676,029 | 818 | 2,049 | 3.17% |
| Worcester County | 893,282 | 1.5K | 591 | 4.23% |
| Essex County | 827,136 | 493 | 1,678 | 2.39% |
| Suffolk County | 790,247 | 58 | 13,625 | -0.14% |
| Norfolk County | 741,897 | 396 | 1,873 | 2.52% |
| Bristol County | 596,415 | 553 | 1,079 | 3.41% |
| Plymouth County | 548,995 | 659 | 833 | 3.9% |
| Hampden County | 465,258 | 617 | 754 | 0.35% |
| Barnstable County | 233,127 | 394 | 592 | 2.22% |
| Hampshire County | 163,451 | 527 | 310 | 10% |
| Berkshire County | 127,399 | 927 | 137 | -1.86% |
| Franklin County | 70,485 | 699 | 101 | -0.64% |
| Dukes County | 21,084 | 103 | 205 | 2.45% |
| Nantucket County | 14,803 | 46 | 322 | 3.95% |
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)