Primary Elections
Idaho Primary Elections 2026
Primary date, filing deadlines, key contested races, and what to watch in Idaho ahead of the 2026 general election.
May 19, 2026
Primary Date
None
Runoff / RCV
March 2026
Filing Deadline
Moderate — Republican Senate p
Competitiveness
Key 2026 Primary Races
| U.S. Senate | Jim Risch (R) is retiring — open seat |
| Governor | Brad Little (R) not up until 2026 — up for re-election |
| U.S. House | ID-1 (Fulcher) and ID-2 (Simpson) safe Republican |
2026 Primary Overview
The major 2026 Idaho story is the Risch Senate retirement. The Republican primary for the open seat will determine who represents Idaho. Conservative vs. very conservative candidates will battle. The state is safely Republican in the general.