# Counties in Massachusetts by population, 2025

All 14 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population`
- Unit: persons
- Definition: Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.
- Source: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program) (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/)
- Retrieved: 2026-10-08
- Citation: U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.
- Web page: https://invokely.ai/rankings/population/massachusetts-counties
- CSV: https://invokely.ai/download/rankings/population/massachusetts-counties.csv

| Rank | Place | persons |
|---:|---|---:|
| 1 | Middlesex County | 1,669,979 |
| 2 | Worcester County | 888,502 |
| 3 | Essex County | 826,653 |
| 4 | Suffolk County | 791,891 |
| 5 | Norfolk County | 739,749 |
| 6 | Bristol County | 593,640 |
| 7 | Plymouth County | 546,829 |
| 8 | Hampden County | 464,338 |
| 9 | Barnstable County | 233,539 |
| 10 | Hampshire County | 164,065 |
| 11 | Berkshire County | 128,224 |
| 12 | Franklin County | 70,698 |
| 13 | Dukes County | 21,219 |
| 14 | Nantucket County | 14,758 |