Middlesex County, MA

40 Thorndike Street
Cambridge, MA 02141-1715
Phone: (617) 494-4000

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NACo NonMember

County Populations
  1980     1990     2000     2010  
 1,366,980  1,398,468  1,465,396  1,503,085

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County Seat: Cambridge
Year Organized: 1643
Square Miles: 817.82
Size of Board:
MSA: Boston-Cambridge-Quincy, MA-NH Metropolitan Statistical Area
  • Federal Funds
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    • Middlesex County Has No Form Of County Government

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