Ranking of Massachusetts Counties By Population in 2021
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2021, the Population for Massachusetts was 7.00M. Among all Massachusetts counties, Middlesex County had the highest population (1.62M), followed by Worcester County (862.05K), and Essex County (807.32K).
The chart below shows the top 10 counties, and the table below shows the ranking of all Massachusetts counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
Related Topics: Massachusetts Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2021 Census.
See this for other years:
Ranking of Massachusetts Counties By Population in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Middlesex County | 1620553 |
| 2 | Worcester County | 862052 |
| 3 | Essex County | 807315 |
| 4 | Suffolk County | 776280 |
| 5 | Norfolk County | 724906 |
| 6 | Bristol County | 579729 |
| 7 | Plymouth County | 532726 |
| 8 | Hampden County | 462640 |
| 9 | Barnstable County | 232379 |
| 10 | Hampshire County | 165069 |
| 11 | Berkshire County | 130199 |
| 12 | Franklin County | 71007 |
| 13 | Dukes County | 21112 |
| 14 | Nantucket County | 14507 |