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List of Massachusetts Counties and County Seats

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The U.S. state of Massachusetts is divided into 14 counties. Explore list of California Counties and their County Seats in alphabetical order and check their population, areas and the date of formation.

List of Massachusetts Counties and County Seat

S.NCountyCounty SeatPopulation(2011)Area Formed
1Barnstable CountyBarnstable215,888396 sq mi1685
2Berkshire CountyPittsfield131,219931 sq mi1761
3Bristol CountyTaunton548,285556 sq mi1685
4Dukes CountyEdgartown16,535104 sq mi1695
5Essex CountySalem and Lawrence743,159498 sq mi1643
6Franklin CountyGreenfield71,372702 sq mi1811
7Hampden CountySpringfield463,490618 sq mi1812
8Hampshire CountyNorthampton158,080529 sq mi1662
9Middlesex CountyCambridge and Lowell1,503,085824 sq mi1643
10Nantucket CountyNantucket10,17248 sq mi1695
11Norfolk CountyDedham670,850400 sq mi1793
12Plymouth CountyPlymouth and Brockton494,919661 sq mi1685
13Suffolk CountyBoston722,02358 sq mi1643
14Worcester CountyWorcester798,5521,513 sq mi1731