Montana State Senate seat · lines in effect since 2024
Montana Senate District 21
A district of about 27,000 people, 21% of adults with a bachelor's degree. It votes R+1.2 relative to the nation for president.
2024 election
Nov 5, 2024- Gayle Lammers (R) · won56.8%
- Sharon Stewart Peregoy (D)43.2%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
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 election for this seat
17 races since 1968; the seat changed party 3 times. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2024 | |||
| 2024 | Gayle Lammers (R) | Sharon Stewart Peregoy (D) | 13.6 |
| Lines first used in 2012 | |||
| 2020 | Jason D. Small (R) | Rae Peppers (D) | 15.6 |
| 2016 | Jason D. Small (R) | Carolyn Peaselopez (D) | 3.0 |
| 2012 | Sharon Stewart Peregoy (D) | — | Unopposed |
| Lines first used in 2002 | |||
| 2008 | Sharon Stewart Peregoy (D) | Randen Schoppe (R) | 26.5 |
| 2004 | Gerald Pease (D) | — | Unopposed |
| 2002 | Trudi Schmidt (D) | Lisa M. Thibault (R) | 28.3 |
| Lines first used in 1992 | |||
| 1998 | Eve Franklin (D) | — | Unopposed |
| 1994 | Eve Franklin (D)Flip | Tom Connor (R) | 21.7 |
| 1992 | Kenneth Mesaros (R) | Gerald D. Nisbet (D) | 2.1 |
| Lines first used in 1982 | |||
| 1988 | Jerry Noble (R)Flip | Chuck Merja (D) | 7.3 |
| 1984 | Ted Neuman (D) | Warren G. Harding (R) | 20.2 |
| Lines first used in 1972 | |||
| 1980 | Harry K. Berg (D)Flip | George F. Roskie (R) | 0.3 |
| 1976 | George F. Roskie (R) | Donald Skinner (D) | 15.6 |
| 1974 | George F. Roskie (R) | C. F. Sorensen (D) | 10.7 |
| Lines first used in 1962 | |||
| 1970 | Glen L. Drake (R) | Joe Reber (D) | 9.7 |
| 1968 | Henry S. Hibbard (R) | J. B. Casey (D) | 26.1 |
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 21
The state's districts in other chambers that share residents with this one, and the share of District 21's area in each.
- U.S. House
- MT-2 100%
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 | |
|---|---|---|---|---|
| President | D+0.6 | No race | R+0.2 | R+2.2 |
| U.S. Senate | No race | D+27.8 | D+7.1 | D+22.6 |
| Governor | D+26.2 | No race | No race | R+2.8 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 8, 2026, 7:01 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 21.
Lower than 98% of seats.
Lower than 84% of seats.
Higher than 86% of seats.
Higher than 88% of seats.
Lower than 82% of seats.
Less dense than 78% 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 4629% college gradsD+13.8Not up in 2026District 16
26% college gradsD+7.1Not up in 2026District 8
22% college gradsD+12.2Held DDistrict 42
43% college gradsR+11.8Held 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