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


25 candidates filed, 1 active for the 2026 Senate election in New Hampshire. Party primary on Sep 8, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2026 | Chris Pappas D | 55.9% | 636,546 | |
| 2020 | Jeanne Shaheen D | 56.7% | 795,428 | |
| 2014 | Jeanne Shaheen D | 51.6% | 486,531 | |
| 2008 | Jeanne Shaheen D | 51.6% | 694,357 | |
| 2002 | John E. Sununu R | 51.1% | 444,542 | |
| 1996 | Bob Smith R | 49.3% | 491,873 | |
| 1990 | Robert C. Smith R | 65.3% | 290,808 | |
| 1984 | Gordon J. Humphrey R | 58.8% | 384,369 | |
| 1978 | Gordon J. Humphrey R | 50.7% | 263,760 |