99chambers

Massachusetts State Senate seat · lines in effect since 2022

Massachusetts State Senate: Suffolk and Middlesex District

A district of about 174,000 people, 75% of adults with a bachelor's degree. It votes D+65.6 relative to the nation for president.

Will Brownsberger (D) · since Nov 6, 2012Next 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+65.62nd most
Democratic
Most DemocraticMost Republican21st seat · the majority lineDistrict D28

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+61.5

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 40 seats. Small marks are other seats in Massachusetts. The black marker is District D28.

Adults with a bachelor's degree75% 97th pct · 2nd of 40 in MA

Higher than 97% of seats.

White adults without a degree15% 8th pct · 37th of 40 in MA

Lower than 92% of seats.

Hispanic residents9% 49th pct · 21st of 40 in MA

Lower than 51% of seats.

Black residents5% 62nd pct · 16th of 40 in MA

Higher than 62% of seats.

Asian residents17% 95th pct · 3rd of 40 in MA

Higher than 95% of seats.

People per square mile10,508 95th pct · 3rd of 40 in MA

Denser than 95% 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 D17
84% college gradsD+65.2Held DDistrict D27
68% college gradsD+65.4Held DDistrict D26
28% Hispanic · 52% college gradsD+60.5Held DDistrict D15
66% college gradsD+44.9Held 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. Democratic (D)
    2027– · Won 2026 by -9.4, 2026 by 81.2
  2. William N. Brownsberger (D)
    2023–2027 · Won 2022 by 98.0, 2024 unopposed

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