Back مقاطعة ميدلسيكس (ماساتشوستس) Arabic Middlesex County, Massachusetts BAR Мидълсекс (окръг, Масачузетс) Bulgarian মিডলসেক্স কাউন্টি, ম্যাসাচুসেট্‌স BPY Comtat de Middlesex (Massachusetts) Catalan Middlesex Gông (Massachusetts) CDO Мидлсекс (гуо, Массачусетс) CE Middlesex County (kondado sa Tinipong Bansa, Massachusetts) CEB Middlesex County, Massachusetts Welsh Middlesex County (Massachusetts) Danish

Middlesex County, Massachusetts

Middlesex County
County
Images, from top down, left to right: The Great Dome at MIT; Hartwell Tavern in Minute Man National Historical Park; Historic buildings of the Lowell mills; Walden Pond in Concord
Official seal of Middlesex County
Seal
Map of Massachusetts highlighting Middlesex County
Location within the U.S. state of Massachusetts
Map of the United States highlighting 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
FoundedMay 10, 1643
Named forMiddlesex, England
SeatLowell and Cambridge (de jure)
Largest cityCambridge
Area
 • Total847 sq mi (2,190 km2)
 • Land818 sq mi (2,120 km2)
 • Water29 sq mi (80 km2)  3.5%
Population
 (2020)
 • Total1,632,002 Increase
 • Density1,996/sq mi (771/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts3rd, 4th, 5th, 6th, 7th

Middlesex County is a county located in the Commonwealth of Massachusetts, United States. As of the 2020 census, the population was 1,632,002,[1] making it the most populous county in both Massachusetts and New England and the 22nd most populous county in the United States. This also makes the county the most populous county on the East Coast outside of New York or Florida. Middlesex County is one of two U.S. counties (along with Santa Clara County, California) to be amongst the top 25 counties with the highest household income and the 25 most populated counties. It is included in the Census Bureau's Boston–Cambridge–Newton, MA–NH Metropolitan Statistical Area. As part of the 2020 United States census, the Commonwealth's mean center of population for that year was geo-centered in Middlesex County, in the town of Natick[2][a] (this is not to be confused with the geographic center of Massachusetts, which is in Rutland, Worcester County).

On July 11, 1997, Massachusetts abolished the executive government of Middlesex County primarily due to the county's insolvency.[3] Middlesex County continues to exist as a geographic boundary[4] and is used primarily as district jurisdictions within the court system and for other administrative purposes; for example, as an election district. The National Weather Service weather alerts (such as severe thunderstorm warning) continue to localize based on Massachusetts's counties.

  1. ^ "Census - Geography Profile: Middlesex County, Massachusetts". United States Census Bureau. Archived from the original on November 15, 2021. Retrieved November 14, 2021.
  2. ^ "STATEFP,STNAME,POPULATION,LATITUDE,LONGITUDE". United States Census Bureau. April 1, 2020. Archived from the original on April 1, 2022. Retrieved October 20, 2022.
  3. ^ Concannon, Brendan (2014). "Massachusetts County Government: A Viable Institution?". Undergraduate Review. 10. Bridgewater State University: 55–62. Retrieved July 31, 2023.
  4. ^ Mass. Gen. L. c. 34B


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