99chambers

Idaho House of Representatives seat · lines in effect since 2022

Idaho Legislative District 12

A district of about 57,000 people, 30% Hispanic, 22% of adults with a bachelor's degree. It votes R+39.3 relative to the nation for president.

Jaron Crane (R) · since Nov 8, 2022Jeff Cornilles (R) · since Nov 5, 2024Next election Nov 7, 2028The 2026 race →

Where it sits among all 35 seats

Every Idaho 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.

R+39.316th most
Democratic
Most DemocraticMost Republican18th seat · the majority lineDistrict 12

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.

20242026
Idaho House of RepresentativesR+41.9R+25.5

Outlined: the race for this seat itselfBlank: no race that year

Source: 99chambers results archive: precinct results allocated to current lines; 2026: Idaho Secretary of StateUpdated 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 Idaho. The black marker is District 12.

Adults with a bachelor's degree22% 12th pct · 31st of 35 in ID

Lower than 88% of seats.

White adults without a degree53% 41st pct · 21st of 35 in ID

Lower than 59% of seats.

Hispanic residents30% 91st pct · 4th of 35 in ID

Higher than 91% of seats.

Black residents1% 65th pct · 13th of 35 in ID

Higher than 65% of seats.

Asian residents1% 24th pct · 27th of 35 in ID

Lower than 76% of seats.

People per square mile2,857 88th pct · 5th of 35 in ID

Denser than 88% 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 13
21% Hispanic · 24% college gradsR+40.0Held RDistrict 11
40% HispanicR+32.1Held RDistrict 33
30% college gradsR+29.6Held RDistrict 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.

  1. Jeff Cornilles (R)
    2025– · Won 2024 by 47.0, 2026 by 26.2
  2. Jeff Comilles (R)
    2023–2025 · Won 2022 unopposed
  3. Jaron Crane (R)
    2023– · Won 2022 unopposed, 2024 by 41.9, 2026 by 25.5

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)