99chambers

Massachusetts State Senate seat · lines in effect since 2022

Massachusetts State Senate: Fifth Middlesex District

A district of about 186,000 people, 57% of adults with a bachelor's degree. It votes D+34.4 relative to the nation for president.

Jason Lewis (D) · since Nov 4, 2014Next 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+34.415th most
Democratic
Most DemocraticMost Republican21st seat · the majority lineDistrict D23

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.

2022
Massachusetts State SenateD+27.2

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 D23.

Adults with a bachelor's degree57% 72nd pct · 12th of 40 in MA

Higher than 72% of seats.

White adults without a degree26% 28th pct · 29th of 40 in MA

Lower than 72% of seats.

Hispanic residents6% 28th pct · 29th of 40 in MA

Lower than 72% of seats.

Black residents6% 69th pct · 13th of 40 in MA

Higher than 69% of seats.

Asian residents16% 90th pct · 5th of 40 in MA

Higher than 90% of seats.

People per square mile5,020 85th pct · 7th of 40 in MA

Denser than 85% 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 D16
58% college gradsD+34.5Held DDistrict D13
60% college gradsD+42.6Held DDistrict D15
66% college gradsD+44.9Held DDistrict D08
49% college gradsD+22.6Held 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. Kate Lipper-Garabedian (D)
    2027– · Won 2026 unopposed
  2. Jason M. Lewis (D)
    2023–2027 · Won 2022 by 27.2, 2024 unopposed

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