Montana State Senate seat · lines in effect since 2024
Montana Senate District 28
A district of about 24,000 people, 32% of adults with a bachelor's degree. It votes R+47.0 relative to the nation for president.
Where it sits among all 50 seats
Every Montana 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.
| 2016 | 2018 | 2020 | 2024 | 2026 | |
|---|---|---|---|---|---|
| U.S. Senate | No race | R+22.5 | R+39.4 | R+53.9 | No race |
| Governor | R+17.2 | No race | No race | R+62.2 | No race |
| Montana State Senate | No race | No race | No race | No race | R+37.0 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: Montana Secretary of StateUpdated Nov 7, 2026, 3:01 PM ET
Who lives here, compared
Grey bars show the spread of all 50 seats. Small marks are other seats in Montana. The black marker is District 28.
Higher than 51% of seats.
Higher than 67% of seats.
Lower than 82% of seats.
Higher than 57% of seats.
Lower than 96% of seats.
Less dense than 80% 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 3536% college gradsR+44.3Not up in 2026District 38
30% college gradsR+41.2Not up in 2026District 13
29% college gradsR+42.8Not up in 2026District 43
28% college gradsR+38.9Held 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 2024.
- Forrest J. Mandeville (R)
2027– · Won 2026 by 37.0
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)