Maine State Senate seat · lines in effect since 2022
Maine Senate District 21
A district of about 38,000 people, 23% of adults with a bachelor's degree. It votes D+9.9 relative to the nation for president.
Where it sits among all 35 seats
Every Maine 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.
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.
| 2022 | |
|---|---|
| Maine State Senate | D+17.0 |
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 35 seats. Small marks are other seats in Maine. The black marker is District 21.
Lower than 88% of seats.
Higher than 68% of seats.
Higher than 79% of seats.
Highest of 35 seats.
Higher than 82% of seats.
Denser than 97% 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 936% college gradsD+11.3CountingDistrict 20
29% college gradsD+1.6CountingDistrict 16
26% college gradsD+3.2CountingDistrict 31
41% college gradsD+18.0Held 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.
- Shanna Cox (D)
2027– · Won 2026 by 23.9 - Margaret R. Rotundo (D)
2023–2027 · Won 2022 by 17.0, 2024 unopposed
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)