Massachusetts
Massachusetts has 14 Counties of which 7 are Geographical Census Areas
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Massachusetts Data Sets Massachusetts Links |
Massachusetts Association of County Commissioners 614 High Street PO Box 310 Dedham, MA 02027-0310 Phone: (781)461-6105 Fax: (781)326-6480
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| County | NACo Member |
2010 Population |
Square Miles |
County Seat | Board Size |
Founded |
|---|---|---|---|---|---|---|
| Barnstable | ![]() |
215,888 | 394 | Barnstable | 3 | 1685 |
| Bristol | ![]() |
548,285 | 553 | Taunton | 3 | 1685 |
| Dukes | ![]() |
16,535 | 103 | Edgartown | 7 | 1695 |
| Nantucket * | ![]() |
10,172 | 45 | Nantucket | 5 | 1695 |
| Norfolk | ![]() |
670,850 | 396 | Dedham | 3 | 1793 |
| Plymouth | 494,919 | 659 | Plymouth and Brockton | 3 | 1685 | |
| Suffolk * | ![]() |
722,023 | 58 | Boston | 13 | 1643 |
| County W/o Govt Structure | 2010 Population | Square Miles |
| Berkshire County | 131,219 | 927 |
| Essex County | 743,159 | 493 |
| Franklin County | 71,372 | 699 |
| Hampden County | 463,490 | 617 |
| Hampshire County | 158,080 | 527 |
| Middlesex County | 1,503,085 | 818 |
| Worcester County | 798,552 | 1,511 |