99chambers

Massachusetts House of Representatives seat · lines in effect since 2022

Massachusetts House of Representatives: 20th Middlesex District

A district of about 50,000 people, 58% of adults with a bachelor's degree. It votes D+8.0 relative to the nation for president.

Brad Jones (R) · since Nov 8, 1994Next 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+8.0128th most
Democratic
Most DemocraticMost Republican81st seat · the majority lineDistrict 78

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.

2026
Massachusetts House of RepresentativesD+11.0

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 78.

Adults with a bachelor's degree58% 70th pct · 49th of 160 in MA

Higher than 70% of seats.

White adults without a degree36% 53rd pct · 75th of 160 in MA

Higher than 53% of seats.

Hispanic residents5% 26th pct · 118th of 160 in MA

Lower than 74% of seats.

Black residents1% 6th pct · 151st of 160 in MA

Lower than 94% of seats.

Asian residents5% 53rd pct · 75th of 160 in MA

Higher than 53% of seats.

People per square mile1,225 40th pct · 96th of 160 in MA

Less dense than 60% 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 10
55% college gradsD+14.2Held RDistrict 104
59% college gradsD+14.5CountingDistrict 45
49% college gradsD+10.2CountingDistrict 116
54% college gradsD+7.4Held R

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. Bradley H. Jones Jr. (R)
    2023– · Won 2022 by 98.0, 2024 unopposed

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