99chambers

Massachusetts House of Representatives seat · lines in effect since 2022

Massachusetts House of Representatives: 1st Suffolk District

A district of about 43,000 people, 52% Hispanic, 38% of adults with a bachelor's degree. It votes D+45.4 relative to the nation for president.

Adrian Madaro (D) · since Nov 8, 2016Next 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+45.442nd most
Democratic
Most DemocraticMost Republican81st seat · the majority lineDistrict 123

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.

2024
U.S. SenateD+42.5

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 123.

Adults with a bachelor's degree38% 35th pct · 104th of 160 in MA

Lower than 65% of seats.

White adults without a degree17% 18th pct · 131st of 160 in MA

Lower than 82% of seats.

Hispanic residents52% 96th pct · 8th of 160 in MA

Higher than 96% of seats.

Black residents4% 50th pct · 81st of 160 in MA

Higher than 50% of seats.

Asian residents4% 50th pct · 80th of 160 in MA

Higher than 50% of seats.

People per square mile5,304 73rd pct · 44th of 160 in MA

Denser than 73% 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 133
64% Hispanic · 23% college gradsD+41.2Held DDistrict 40
68% Hispanic · 31% college gradsD+29.7Held DDistrict 48
52% Hispanic · 25% college gradsD+31.5Held DDistrict 156
38% Hispanic · 29% college gradsD+35.8Held 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.

  1. Adrian C. Madaro (D)
    2023– · Won 2022 by 95.4, 2024 unopposed, 2026 unopposed

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