One of two U.S. Senate seats representing the state of Oregon. Senators serve six-year terms and represent the entire state population.


10 candidates filed, 2 active for the 2026 Senate election in Oregon. Party primary on May 19, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2022 | Wyden Ron D | 55.9% | 1,925,752 | |
| 2020 | Jeff Merkley D | 57.0% | 2,318,847 | |
| 2016 | Ron Wyden D | 56.7% | 1,950,420 | |
| 2014 | Jeff Merkley D | 56.0% | 1,454,946 | |
| 2010 | Ron Wyden D | 57.3% | 1,441,140 | |
| 2008 | Jeff Merkley D | 49.1% | 1,762,116 | |
| 2004 | Ron Wyden D | 63.4% | 1,779,014 | |
| 2002 | Gordon Smith R | 56.3% | 1,265,867 | |
| 1998 | Ron Wyden D | 61.1% | 1,116,334 | |
| 1996 | Gordon Smith R | 49.8% | 1,358,828 | |
| 1992 | Bob Packwood R | 52.9% | 1,357,306 | |
| 1990 | Mark O. Hatfield R | 53.8% | 1,097,838 | |
| 1986 | Bob Packwood R | 63.6% | 1,032,052 | |
| 1984 | Mark O. Hatfield R | 66.6% | 1,214,274 | |
| 1980 | Bob Packwood R | 52.1% | 1,139,939 |