U.S. House seat for Idaho's 1st congressional district. Representatives serve two-year terms.

7 candidates filed, 4 active for the 2026 House election in Idaho District 1. Party primary on May 19, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Russ Fulcher R | 71.0% | 466,232 | |
| 2022 | Russ Fulcher R | 71.3% | 312,442 | |
| 2020 | Russ Fulcher R | 67.8% | 458,576 | |
| 2018 | Russ Fulcher R | 62.8% | 314,978 | |
| 2016 | Raul R Labrador R | 68.2% | 355,304 | |
| 2014 | Raul R Labrador R | 65.0% | 220,857 | |
| 2012 | Raul R Labrador R | 63.0% | 316,724 | |
| 2010 | Raul R Labrador R | 51.0% | 247,427 | |
| 2008 | Walt Minnick D | 50.6% | 347,585 | |
| 2006 | Bill Sali R | 49.9% | 231,974 | |
| 2004 | C L \"Butch\" Otter R | 69.5% | 298,589 | |
| 2002 | C L \"Butch\" Otter R | 58.6% | 206,141 | |
| 2000 | C L \"Butch\" Otter R | 64.8% | 268,116 | |
| 1998 | Helen Chenoweth R | 55.3% | 204,884 | |
| 1996 | Helen Chenoweth R | 50.0% | 264,778 |