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Welcome to Middlesex County ...

Time Zone: Middlesex County lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time.

The community of Cambridge is the Seat for Middlesex County.

Middlesex County is one of the original counties of Massachusetts and was founded in 1643.

From the Census Estimates for 2019, <1> Middlesex had a population of 1,611,699 people. This is an increase of 6.9% since the last Census (which gave a population of 1,507,681 people in 2010).

At the time of the 2010 Census, Middlesex represented 23.03% of the total population of Massachusetts.

Below are some of the communities located in Middlesex County:

  • Acton
    (8 miles [12.9 km] to the west)
    • Acton is located in Middlesex County (MA)
    • Jump to our Gazetteer entry for Acton
    • Population from the 2020 Census: 23,503 people
  • Arlington
    (6 miles [9.7 km] to the southeast)
    • Arlington is located in Middlesex County (MA)
    • Jump to our Gazetteer entry for Arlington
    • Population from the 2020 Census: 45,169 people
  • Ashby
    (31 miles [49.9 km] to the northwest)
    • Ashby is located in Middlesex County (MA)
    • Jump to our Gazetteer entry for Ashby
    • Population from the 2020 Census: 3,204 people
  • Ashland
    (16 miles [25.7 km] to the southwest)
    • Ashland is located in Middlesex County (MA)
    • Jump to our Gazetteer entry for Ashland
    • Population from the 2020 Census: 17,887 people
  • Ayer
    (17 miles [27.4 km] to the northwest)
    • Ayer is located in Middlesex County (MA)
    • Jump to our Gazetteer entry for Ayer
    • Population from the 2020 Census: 8,211 people
  • Bedford
    (2 miles [3.2 km] to the north)
    • Bedford is located in Middlesex County (MA)
    • Jump to our Gazetteer entry for Bedford
    • Population from the 2020 Census: 14,053 people
  • Belmont
    (6 miles [9.7 km] to the southeast)
    • Belmont is located in Middlesex County (MA)
    • Jump to our Gazetteer entry for Belmont
    • Population from the 2020 Census: 25,873 people
  • Billerica
    (6 miles [9.7 km] to the north)
    • Billerica is located in Middlesex County (MA)
    • Jump to our Gazetteer entry for Billerica
    • Population from the 2020 Census: 43,021 people
  • Continue List   (45 more) ...
    • Boxborough
      (12 miles [19.3 km] to the west)
      • Boxborough is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Boxborough
      • Population from the 2020 Census: 5,752 people
    • Burlington
      (5 miles [8 km] to the northeast)
      • Burlington is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Burlington
      • Population from the 2020 Census: 28,432 people
    • Cambridge
      (9 miles [14.5 km] to the southeast)
      • Cambridge is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Cambridge
      • Population from the 2020 Census: 119,192 people
    • Carlisle
      (6 miles [9.7 km] to the northwest)
      • Carlisle is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Carlisle
      • Population from the 2020 Census: 5,231 people
    • Chelmsford
      (10 miles [16.1 km] to the northwest)
      • Chelmsford is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Chelmsford
      • Population from the 2020 Census: 35,528 people
    • Concord
      (3 miles [4.8 km] to the west)
      • Concord is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Concord
      • Population from the 2020 Census: 18,765 people
    • Dracut
      (14 miles [22.5 km] to the north)
      • Dracut is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Dracut
      • Population from the 2020 Census: 31,423 people
    • Dunstable
      (18 miles [29 km] to the northwest)
      • Dunstable is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Dunstable
      • Population from the 2020 Census: 3,404 people
    • Everett
      (11 miles [17.7 km] to the east)
      • Everett is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Everett
      • Population from the 2020 Census: 46,107 people
    • Framingham
      (14 miles [22.5 km] to the southwest)
      • Framingham is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Framingham
      • Population from the 2020 Census: 73,892 people
    • Groton
      (18 miles [29 km] to the northwest)
      • Groton is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Groton
      • Population from the 2020 Census: 11,256 people
    • Holliston
      (19 miles [30.6 km] to the southwest)
      • Holliston is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Holliston
      • Population from the 2020 Census: 14,880 people
    • Hopkinton
      (20 miles [32.2 km] to the southwest)
      • Hopkinton is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Hopkinton
      • Population from the 2020 Census: 18,624 people
    • Hudson
      (15 miles [24.1 km] to the west)
      • Hudson is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Hudson
      • Population from the 2020 Census: 19,732 people
    • Lexington
      (2 miles [3.2 km] to the east)
      • Lexington is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Lexington
      • Population from the 2020 Census: 33,003 people
    • Lincoln
      (2 miles [3.2 km] to the southwest)
      • Lincoln is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Lincoln
      • Population from the 2020 Census: 6,993 people
    • Littleton
      (13 miles [20.9 km] to the northwest)
      • Littleton is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Littleton
      • Population from the 2020 Census: 10,253 people
    • Lowell
      (12 miles [19.3 km] to the north)
      • Lowell is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Lowell
      • Population from the 2020 Census: 110,904 people
    • Malden
      (10 miles [16.1 km] to the east)
      • Malden is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Malden
      • Population from the 2020 Census: 59,922 people
    • Marlborough
      (15 miles [24.1 km] to the southwest)
      • Marlborough is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Marlborough
      • Population from the 2020 Census: 39,290 people
    • Maynard
      (9 miles [14.5 km] to the west)
      • Maynard is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Maynard
      • Population from the 2020 Census: 11,288 people
    • Medford
      (9 miles [14.5 km] to the east)
      • Medford is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Medford
      • Population from the 2020 Census: 60,847 people
    • Melrose
      (10 miles [16.1 km] to the east)
      • Melrose is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Melrose
      • Population from the 2020 Census: 27,790 people
    • Natick
      (12 miles [19.3 km] to the south)
      • Natick is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Natick
      • Population from the 2020 Census: 35,766 people
    • Newton
      (9 miles [14.5 km] to the south)
      • Newton is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Newton
      • Population from the 2020 Census: 87,803 people
    • North Reading
      (12 miles [19.3 km] to the northeast)
      • North Reading is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for North Reading
      • Population from the 2020 Census: 15,904 people
    • Pepperell
      (21 miles [33.8 km] to the northwest)
      • Pepperell is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Pepperell
      • Population from the 2020 Census: 12,043 people
    • Reading
      (10 miles [16.1 km] to the northeast)
      • Reading is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Reading
      • Population from the 2020 Census: 25,535 people
    • Sherborn
      (15 miles [24.1 km] to the south)
      • Sherborn is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Sherborn
      • Population from the 2020 Census: 4,383 people
    • Shirley
      (19 miles [30.6 km] to the west)
      • Shirley is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Shirley
      • Population from the 2020 Census: 7,554 people
    • Somerville
      (10 miles [16.1 km] to the southeast)
      • Somerville is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Somerville
      • Population from the 2020 Census: 80,935 people
    • Stoneham
      (9 miles [14.5 km] to the east)
      • Stoneham is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Stoneham
      • Population from the 2020 Census: 23,961 people
    • Stow
      (11 miles [17.7 km] to the west)
      • Stow is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Stow
      • Population from the 2020 Census: 7,178 people
    • Sudbury
      (8 miles [12.9 km] to the southwest)
      • Sudbury is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Sudbury
      • Population from the 2020 Census: 19,453 people
    • Tewksbury
      (10 miles [16.1 km] to the north)
      • Tewksbury is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Tewksbury
      • Population from the 2020 Census: 30,970 people
    • Townsend
      (26 miles [41.8 km] to the northwest)
      • Townsend is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Townsend
      • Population from the 2020 Census: 9,448 people
    • Tyngsbororough
      (16 miles [25.7 km] to the northwest)
      • Tyngsbororough is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Tyngsbororough
      • Population from the 2020 Census: 12,646 people
    • Wakefield
      (10 miles [16.1 km] to the east)
      • Wakefield is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Wakefield
      • Population from the 2020 Census: 27,051 people
    • Waltham
      (5 miles [8 km] to the south)
      • Waltham is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Waltham
      • Population from the 2020 Census: 62,069 people
    • Wayland
      (7 miles [11.3 km] to the southwest)
      • Wayland is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Wayland
      • Population from the 2020 Census: 13,722 people
    • Westford
      (11 miles [17.7 km] to the northwest)
      • Westford is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Westford
      • Population from the 2020 Census: 25,276 people
    • Weston
      (6 miles [9.7 km] to the south)
      • Weston is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Weston
      • Population from the 2020 Census: 12,028 people
    • Wilmington
      (7 miles [11.3 km] to the northeast)
      • Wilmington is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Wilmington
      • Population from the 2020 Census: 23,287 people
    • Winchester
      (7 miles [11.3 km] to the east)
      • Winchester is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Winchester
      • Population from the 2020 Census: 22,678 people
    • Woburn
      (6 miles [9.7 km] to the east)
      • Woburn is located in Middlesex County (MA)
      • Jump to our Gazetteer entry for Woburn
      • Population from the 2020 Census: 40,135 people

Websites of Interest ...

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census.