Massachusetts Senate's 1st Middlesex district

The district includes the following localities:^[2]

• Dunstable
• Groton
• Lowell
• Pepperell
• Tyngsborough
• Westford

The current district geographic boundary overlaps with those of the Massachusetts House of Representatives' 1st Middlesex, 2nd Middlesex, 16th Middlesex, 17th Middlesex, 18th Middlesex, and 36th Middlesex districts.^[4]

The district previously covered Charlestown, circa 1860s.^[5]

• E.L. Norton, circa 1859 ^[6]
• Andrew J. Bailey, circa 1874
• James Vahey
• James MacPherson
• Abbott Rice
• Arthur W. Hollis, circa 1935 ^[7]
• Joseph F. Montminy, circa 1945 ^[8]
• Paul Achin, circa 1953
• Edward Joseph DeSaulnier, Jr., circa 1957 ^[9]
• John Edward Harrington, Jr., circa 1969 ^[10]
• Bernard Joseph Tully, circa 1979 ^[11]
• Philip Shea, circa 1983
• Paul J. Sheehy, circa 1985 ^[12]
• Nancy Achin Sullivan, circa 1991
• Daniel P. Leahy, circa 1993 ^[13]
• Steven C. Panagiotakos, circa 2002 ^[14]
• Eileen Donoghue^[15]
• Edward J. Kennedy, 2019-current^[3]

Portraits of legislators

• 
  James Vahey
• 
  James MacPherson
• 
  Abbott Rice
• 
  Joseph Montminy
• 
  Paul Achin
• 
  John Edward Harrington
• 
  Bernard Joseph Tully
• 
  Philip Shea
• 
  Nancy Achin Sullivan

• List of Massachusetts Senate elections
• List of Massachusetts General Courts
• List of former districts of the Massachusetts Senate
• Other Middlesex County districts of the Massachusett Senate: 2nd, 3rd, 4th, 5th; 1st Essex and Middlesex; 2nd Essex and Middlesex; 1st Middlesex and Norfolk, 2nd Middlesex and Norfolk; Middlesex and Suffolk; Middlesex and Worcester; Norfolk, Bristol and Middlesex; 1st Suffolk and Middlesex; 2nd Suffolk and Middlesex
• Middlesex County districts of the Massachusetts House of Representatives: 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 13th, 14th, 15th, 16th, 17th, 18th, 19th, 20th, 21st, 22nd, 23rd, 24th, 25th, 26th, 27th, 28th, 29th, 30th, 31st, 32nd, 33rd, 34th, 35th, 36th, 37th

• "Multiple-choice test for voters: Open seats in Mass. House, Senate create wide-open First Middlesex races", Boston Globe, September 2, 2010

• Ballotpedia
• "First Middlesex District, MA". Censusreporter.org. (State Senate district information based on U.S. Census Bureau's American Community Survey).
• "First Middlesex District", Senatoredkennedy.com, archived from the original on May 14, 2020
• League of Women Voters of Westford