99chambers

Massachusetts House of Representatives seat · lines in effect since 2022

Massachusetts House of Representatives: 3rd Barnstable District

A district of about 43,000 people, 47% of adults with a bachelor's degree. It votes D+18.7 relative to the nation for president.

Dave Vieira (R) · since Nov 2, 2010Next 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+18.799th most
Democratic
Most DemocraticMost Republican81st seat · the majority lineDistrict 3

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.

202220242026
Massachusetts House of RepresentativesR+10.8R+12.1D+3.5

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 160 seats. Small marks are other seats in Massachusetts. The black marker is District 3.

Adults with a bachelor's degree47% 52nd pct · 78th of 160 in MA

Higher than 52% of seats.

White adults without a degree47% 73rd pct · 44th of 160 in MA

Higher than 73% of seats.

Hispanic residents2% 4th pct · 154th of 160 in MA

Lower than 96% of seats.

Black residents2% 25th pct · 121st of 160 in MA

Lower than 75% of seats.

Asian residents1% 12th pct · 141st of 160 in MA

Lower than 88% of seats.

People per square mile484 16th pct · 134th of 160 in MA

Less dense than 84% 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 1
47% college gradsD+22.4Held DDistrict 153
45% college gradsD+15.6CountingDistrict 111
49% college gradsD+10.1Held DDistrict 150
48% college gradsD+14.3Held 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. David T. Vieira (R)
    2023– · Won 2022 by 10.8, 2024 by 12.1

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