Massachusetts House of Representatives seat · lines in effect since 2022
Massachusetts House of Representatives: 12th Essex District
A district of about 42,000 people, 34% of adults with a bachelor's degree. It votes D+10.5 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
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 35.
Lower than 74% of seats.
Higher than 75% of seats.
Higher than 77% of seats.
Higher than 66% of seats.
Lower than 72% of seats.
Denser than 65% 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 14534% college gradsD+11.6Held DDistrict 38
21% Hispanic · 37% college gradsD+4.8Held DDistrict 11
33% college gradsD+13.1Held DDistrict 51
21% Hispanic · 23% college gradsD+7.5Held 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.
- Thomas P. Walsh (D)
2023– · Won 2022 by 94.6, 2024 unopposed, 2026 unopposed
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)