Massachusetts Counties by Population (2024)

by Kristen Carney Kristen Carney

Updated: June 20, 2024

The most populous counties in Massachusetts are Middlesex County with 1,623,952, Worcester County at 866,866, Essex County with 810,089, Suffolk County at 768,425, and Norfolk County with 727,473. 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 2023 Population Estimates Program.

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Rank County Population
1 Middlesex County 1,623,952
2 Worcester County 866,866
3 Essex County 810,089
4 Suffolk County 768,425
5 Norfolk County 727,473
6 Bristol County 581,841
7 Plymouth County 535,308
8 Hampden County 460,291
9 Barnstable County 231,735
10 Hampshire County 162,502
11 Berkshire County 126,818
12 Franklin County 70,836
13 Dukes County 20,819
14 Nantucket County 14,444

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2023. Population Division. May 2024.

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