Massachusetts House of Representatives seat · lines in effect since 2022
Massachusetts House of Representatives: 9th Norfolk District
A district of about 45,000 people, 59% of adults with a bachelor's degree. It votes D+14.5 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
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2022 | 2024 | 2026 | |
|---|---|---|---|
| Massachusetts House of Representatives | R+1.7 | R+14.8 | R+4.7 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 7, 2026, 3:01 PM 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 104.
Higher than 73% of seats.
Higher than 51% of seats.
Lower than 78% of seats.
Higher than 56% of seats.
Lower than 69% of seats.
Less dense than 75% 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 1055% college gradsD+14.2Held RDistrict 114
58% college gradsD+16.7Held DDistrict 37
58% college gradsD+21.4Held DDistrict 78
58% college gradsD+8.0Counting
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.
- Marcus S. Vaughn (R)
2023– · Won 2022 by 1.7, 2024 by 14.8
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)