99chambers

Massachusetts State Senate seat · lines in effect since 2022

Massachusetts State Senate: Middlesex and Suffolk District

A district of about 187,000 people, 28% Hispanic, 52% of adults with a bachelor's degree. It votes D+60.5 relative to the nation for president.

Sal DiDomenico (D) · since Nov 2, 2010Next election Nov 7, 2028The 2026 race →

Where it sits among all 40 seats

Every Massachusetts State Senate 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+60.55th most
Democratic
Most DemocraticMost Republican21st seat · the majority lineDistrict D26

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+32.7

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 40 seats. Small marks are other seats in Massachusetts. The black marker is District D26.

Adults with a bachelor's degree52% 67th pct · 14th of 40 in MA

Higher than 67% of seats.

White adults without a degree16% 10th pct · 36th of 40 in MA

Lower than 90% of seats.

Hispanic residents28% 90th pct · 5th of 40 in MA

Higher than 90% of seats.

Black residents9% 85th pct · 7th of 40 in MA

Higher than 85% of seats.

Asian residents13% 82nd pct · 8th of 40 in MA

Higher than 82% of seats.

People per square mile16,412 100th pct · 1st of 40 in MA

Densest of 40 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 D27
68% college gradsD+65.4Held DDistrict D30
54% college gradsD+52.9Held DDistrict D28
75% college gradsD+65.6Held DDistrict D25
30% Hispanic · 49% college gradsD+38.2Held 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. Sal DiDomenico (D)
    2027– · Won 2026 unopposed
  2. Sal N. di Domenico (D)
    2025–2027 · Won 2024 unopposed
  3. Sal N. Didomenico (D)
    2023–2025 · Won 2022 by 97.7

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