99chambers

Massachusetts House of Representatives seat · lines in effect since 2022

Massachusetts House of Representatives: 1st Middlesex District

A district of about 46,000 people, 46% of adults with a bachelor's degree. It votes D+10.1 relative to the nation for president.

Margaret Scarsdale (D) · since Nov 8, 2022Next election Nov 7, 2028The 2026 race →

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.

D+10.1124th most
Democratic
Most DemocraticMost Republican81st seat · the majority lineDistrict 59

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.

202220242026
Massachusetts House of RepresentativesEvenD+2.7D+19.5

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 59.

Adults with a bachelor's degree46% 51st pct · 79th of 160 in MA

Higher than 51% of seats.

White adults without a degree48% 78th pct · 36th of 160 in MA

Higher than 78% of seats.

Hispanic residents5% 28th pct · 116th of 160 in MA

Lower than 72% of seats.

Black residents2% 26th pct · 119th of 160 in MA

Lower than 74% of seats.

Asian residents4% 45th pct · 88th of 160 in MA

Lower than 55% of seats.

People per square mile322 8th pct · 147th of 160 in MA

Less dense than 92% 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. 1 of the 4 flipped this year.

District 5
47% college gradsD+6.2Held RDistrict 111
49% college gradsD+10.1Held DDistrict 45
49% college gradsD+10.2CountingDistrict 142
52% college gradsD+8.4Flipped 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.

  1. Margaret R. Scarsdale (D)
    2023– · Won 2022 by 0.0, 2024 by 2.7

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)