Middlesex County, Massachusetts

Middlesex County
County
Middlesex South Registry of Deeds in Cambridge
Seal
Location within the U.S. state of Massachusetts
Massachusetts's location within the U.S.
Coordinates: 42°29′N 71°23′W / 42.49°N 71.39°W / 42.49; -71.39
Country	United States
State	Massachusetts
Founded	May 10, 1643
Named for	Middlesex, England
Seat	Lowell and Cambridge
Largest city	Cambridge
Area
• Total	847 sq mi (2,190 km2)
• Land	818 sq mi (2,120 km2)
• Water	29 sq mi (80 km2)  3.5%
Population  (2020)
• Total	1,632,002
• Density	1,996/sq mi (771/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional districts	3rd, 4th, 5th, 6th, 7th

Middlesex County is a county in the U.S. state of Massachusetts, in the United States. As of 2020, the population was 1,632,002,^[1] making it the 22nd most populous county in the United States. It is the most populous county in both Massachusetts and New England.

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