Middlesex
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Middlesex

County
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Details

GEOID
25017
State
MA
Population
1,669,979 (2025 est.)
Data Source
Census tiger
Center Coordinates
42.4855, -71.3917

Geographic Boundary

Cities & Towns (10)

place Boston
672,973
place Worcester
213,862
place Springfield
154,702
place Cambridge
122,588
place Lowell
119,971
place Lynn
104,236
place Quincy
103,173
place New Bedford
101,834
place Fall River
95,298
place Newton
90,741

Data Completeness

40% (4/10)
Geographic boundary
Center coordinates
Wikipedia link
Budget link
Agencies (5)
Services
Legislative bodies
Elected officials
State abbreviation
Parent jurisdiction
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Agencies (5)

Middlesex County District Attorney's Office

Judicial Middlesex

Prosecutorial office serving Middlesex County, MA. Responsible for criminal prosecution across the county's municipalities.

Middlesex County Sheriff's Office

Public_safety Middlesex

Law enforcement and correctional services for Middlesex County, MA. Operates jail and house of correction. Recognized nationally for innovative correctional-based treatment programming.

Middlesex County Retirement Board

Executive Middlesex

Provides retirement, disability, and survivor benefits to approximately 5,000 retirees and 10,000 active employees of 31 towns and 39 districts and authorities within Middlesex County.

Middlesex South Registry of Deeds

Executive Middlesex

Records and maintains real estate documents for the Southern District of Middlesex County, serving over 40 communities including Cambridge, Somerville, Newton, Framingham, and Waltham.

Middlesex North Registry of Deeds

Executive Middlesex

Records and maintains real estate documents for the Northern District of Middlesex County, serving Billerica, Carlisle, Chelmsford, Dracut, Dunstable, Lowell, Tewksbury, Tyngsborough, Westford, and Wilmington.