Massachusetts House of Representatives seat · lines in effect since 2022
Massachusetts House of Representatives: 25th Middlesex District
A district of about 43,000 people, 87% of adults with a bachelor's degree. It votes D+88.6 relative to the nation for president.
Where it sits among all 160 seats
Every Massachusetts House of Representatives seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who lives here, compared
Grey bars show the spread of all 160 seats. Small marks are other seats in Massachusetts. The black marker is District 83.
Higher than 99% of seats.
Lower than 98% of seats.
Higher than 52% of seats.
Higher than 79% of seats.
Higher than 92% of seats.
Denser than 99% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 11086% college gradsD+78.4Held DDistrict 84
70% college gradsD+78.2Held DDistrict 85
78% college gradsD+81.4Held DDistrict 139
73% college gradsD+71.8Held D
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who has held it
These lines took effect in 2022.
- Democratic (D)
2027– · Won 2026 unopposed - Marjorie C. Decker (D)
2023–2027 · Won 2022 by 99.0, 2024 by 95.0
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)