Idaho State Senate seat · lines in effect since 2022
Idaho Legislative District 21
A district of about 50,000 people, 37% of adults with a bachelor's degree. It votes R+30.2 relative to the nation for president.
Where it sits among all 35 seats
Every Idaho 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
Who lives here, compared
Grey bars show the spread of all 35 seats. Small marks are other seats in Idaho. The black marker is District 21.
Higher than 74% of seats.
Lower than 65% of seats.
Higher than 56% of seats.
Higher than 82% of seats.
Higher than 76% of seats.
Denser than 82% 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 2242% college gradsR+28.0Held RDistrict 20
46% college gradsR+32.0Held RDistrict 29
31% college gradsR+11.8Held DDistrict 25
22% college gradsR+37.8Held 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 2022.
- Treg A. Bernt (R)
2023– · Won 2022 by 66.3, 2024 by 48.5, 2026 unopposed
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)