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

NACo NonMember

County Populations
  1980     1990     2000     2005  
 1,366,980  1,398,468  1,465,396  1,459,011

County Seat: Cambridge
Year Organized: 1643
Square Miles: 824
Size of Board:
MSA: Boston-Cambridge-Quincy, MA-NH Metropolitan Statistical Area
  • Places in Middlesex County
  • Census Bureau Quick Facts
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    • Middlesex County Has No Form Of County Government

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