99chambers

Massachusetts House of Representatives seat · lines in effect since 2022

Massachusetts House of Representatives: 19th Middlesex District

A district of about 37,000 people, 46% of adults with a bachelor's degree. It votes D+2.8 relative to the nation for president.

Dave Robertson (D) · since Nov 6, 2018Next 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+2.8139th most
Democratic
Most DemocraticMost Republican81st seat · the majority lineDistrict 77

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.

20222024
Massachusetts House of RepresentativesD+12.6D+13.7

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 77.

Adults with a bachelor's degree46% 49th pct · 82nd of 160 in MA

Lower than 51% of seats.

White adults without a degree49% 81st pct · 31st of 160 in MA

Higher than 81% of seats.

Hispanic residents4% 10th pct · 144th of 160 in MA

Lower than 90% of seats.

Black residents1% 16th pct · 134th of 160 in MA

Lower than 84% of seats.

Asian residents4% 47th pct · 85th of 160 in MA

Lower than 53% of seats.

People per square mile1,344 44th pct · 90th of 160 in MA

Less dense than 56% 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 115
49% college gradsD+2.0CountingDistrict 36
46% college gradsD+8.4Held DDistrict 32
42% college gradsD+4.7CountingDistrict 148
39% college gradsD+1.3Counting

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 A. Robertson (D)
    2023– · Won 2022 by 12.6, 2024 by 13.7, 2026 unopposed

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