Massachusetts Counties by Population (2026)
by Kristen Carney
Updated: February 9, 2026
The most populous counties in Massachusetts are Middlesex County with 1,638,365, Worcester County at 867,788, Essex County with 813,054, Suffolk County at 785,121, and Norfolk County with 730,082. 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 American Community Survey.
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 | 1,638,365 |
| 2 | Worcester County | 867,788 |
| 3 | Essex County | 813,054 |
| 4 | Suffolk County | 785,121 |
| 5 | Norfolk County | 730,082 |
| 6 | Bristol County | 582,270 |
| 7 | Plymouth County | 535,075 |
| 8 | Hampden County | 462,815 |
| 9 | Barnstable County | 231,668 |
| 10 | Hampshire County | 162,028 |
| 11 | Berkshire County | 129,430 |
| 12 | Franklin County | 70,944 |
| 13 | Dukes County | 20,933 |
| 14 | Nantucket County | 14,483 |
|
United States Census Bureau. B01001 SEX BY AGE, 2024 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. January 29, 2026. http://www.census.gov/. |
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