99chambers

Massachusetts State Senate seat · lines in effect since 2022

Massachusetts State Senate: Third Suffolk District

A district of about 179,000 people, 30% Hispanic, 49% of adults with a bachelor's degree. It votes D+38.2 relative to the nation for president.

Lydia Edwards (D) · since Nov 8, 2022Next 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+38.211th most
Democratic
Most DemocraticMost Republican21st seat · the majority lineDistrict D25

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+42.2
Massachusetts State SenateD+40.4

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 D25.

Adults with a bachelor's degree49% 54th pct · 19th of 40 in MA

Higher than 54% of seats.

White adults without a degree24% 21st pct · 32nd of 40 in MA

Lower than 79% of seats.

Hispanic residents30% 95th pct · 3rd of 40 in MA

Higher than 95% of seats.

Black residents4% 51st pct · 20th of 40 in MA

Higher than 51% of seats.

Asian residents7% 59th pct · 17th of 40 in MA

Higher than 59% of seats.

People per square mile6,252 90th pct · 5th of 40 in MA

Denser than 90% 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 D09
24% Hispanic · 42% college gradsD+32.4Held DDistrict D18
60% college gradsD+37.5Held DDistrict D13
60% college gradsD+42.6Held DDistrict D24
29% Hispanic · 38% college gradsD+22.1Held 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. Lydia Marie Edwards (D)
    2023– · Won 2022 by 94.0, 2024 by 40.4, 2026 unopposed

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