Ranking of Massachusetts Counties By Population in 2012

Updated on June 21, 2025.

Based on the US Census Vintage data estimates, in 2012, the Population for Massachusetts was 6.66M. Among all Massachusetts counties, Middlesex County had the highest population (1.54M), followed by Worcester County (807.05K), and Essex County (757.41K).

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.

See this for other years:
Ranking of Massachusetts Counties By Population in 2012
Middlesex
Worcester
Essex
Suffolk
Norfolk
Bristol
Plymouth
Hampden
Barnstable
Hampshire
Ranking of Massachusetts Counties By Population in 2012
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Rank County Population
1 Middlesex County 1543163
2 Worcester County 807047
3 Essex County 757409
4 Suffolk County 751371
5 Norfolk County 682984
6 Bristol County 551204
7 Plymouth County 499545
8 Hampden County 467009
9 Barnstable County 214854
10 Hampshire County 160497
11 Berkshire County 130321
12 Franklin County 71714
13 Dukes County 16838
14 Nantucket County 10313