Maine House of Representatives seat · lines in effect since 2022
Maine House District 78
A district of about 12,000 people, 23% of adults with a bachelor's degree. It votes R+4.7 relative to the nation for president.
Where it sits among all 151 seats
Every Maine 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.
Democratic
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.
| 2018 | 2022 | 2024 | 2026 | |
|---|---|---|---|---|
| U.S. Senate | R+30.4 | No race | No race | No race |
| Governor | R+2.0 | No race | No race | No race |
| Maine House of Representatives | No race | R+9.9 | R+16.2 | R+9.2 |
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 151 seats. Small marks are other seats in Maine. The black marker is District 78.
Lower than 83% of seats.
Higher than 83% of seats.
Lower than 86% of seats.
Lower than 82% of seats.
Higher than 76% of seats.
Less dense than 76% 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 3826% college gradsR+11.6CountingDistrict 66
26% college gradsR+10.7Held RDistrict 136
26% college gradsR+9.3CountingDistrict 140
27% college gradsR+6.5Counting
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.
- Rachel Ann Henderson (R)
2023– · Won 2022 by 9.9, 2024 by 16.2
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)