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

11 candidates filed, 3 active for the 2026 House election in Montana District 1. Party primary on Jun 2, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Ryan K. Zinke R | 52.3% | 322,266 | |
| 2022 | Ryan K Zinke R | 49.6% | 247,960 | |
| 1990 | Pat Williams D | 61.1% | 164,246 | |
| 1988 | Pat Williams D | 60.8% | 189,683 | |
| 1986 | Pat Williams D | 61.7% | 159,731 | |
| 1984 | Pat Williams D | 65.6% | 193,452 | |
| 1982 | Pat Williams D | 59.7% | 167,602 | |
| 1980 | Pat Williams D | 61.4% | 183,740 | |
| 1978 | Pat Williams D | 57.3% | 150,109 | |
| 1976 | Max Baucus D | 66.4% | 167,784 |