Massachusetts

Massachusetts has 14 Counties of which 7 are Geographical Census Areas

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Massachusetts Association of County Commissioners
614 High St
Po Box 310
Dedham, MA 02026-1897
Phone: (781)461-6105
Fax: (781)326-6480

County NACo
Member
2010
Population
Square
Miles
County Seat Board
Size
Founded
Barnstable 215,888 394 Barnstable   1685 
Bristol 548,285 553 Taunton   1685 
Dukes 16,535 103 Edgartown   1695 
Nantucket* 10,172 45 Nantucket   1695 
Norfolk 670,850 396 Dedham   1793 
Plymouth   494,919 659 Plymouth and Brockton   1685 
Suffolk* 722,023 58 Boston  13  1643 

  * Consolidated City-County Government


County W/o Govt Structures

County W/o Govt Structure 2010 Population Square Miles
Berkshire County 131,219927
Essex County 743,159493
Franklin County 71,372699
Hampden County 463,490617
Hampshire County 158,080527
Middlesex County 1,503,085818
Worcester County 798,5521,511