Massachusetts Counties by Population (2025)
by Kristen Carney 
Updated: August 7, 2025
The most populous counties in Massachusetts are Middlesex County with 1,668,956, Worcester County at 881,248, Essex County with 823,938, Suffolk County at 793,144, and Norfolk County with 740,754. You can get the most current Census population data for all 14 Massachusetts counties, sorted from the most populous counties in Massachusetts to the least, according to the 2024 Population Estimates Program.
Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Massachusetts counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!
| Rank | County | Population |
|---|---|---|
| 1 | Middlesex County | 1,668,956 |
| 2 | Worcester County | 881,248 |
| 3 | Essex County | 823,938 |
| 4 | Suffolk County | 793,144 |
| 5 | Norfolk County | 740,754 |
| 6 | Bristol County | 588,593 |
| 7 | Plymouth County | 542,090 |
| 8 | Hampden County | 464,151 |
| 9 | Barnstable County | 232,570 |
| 10 | Hampshire County | 165,399 |
| 11 | Berkshire County | 128,726 |
| 12 | Franklin County | 70,871 |
| 13 | Dukes County | 21,061 |
| 14 | Nantucket County | 14,670 |
|
United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2024. Population Division. May 2025. |
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