The 2026 New Hampshire U.S. Senate primary is September 8, 2026, and the winner advances to the November 3, 2026 general election. Londonderry is in New Hampshire’s 1st congressional district
Current publicly announced or actively discussed candidates include:
Democratic candidates
- Chris Pappas — U.S. Representative for NH-01; widely viewed as a leading Democratic candidate.
- Karishma Manzur — medical scientist and nonprofit leader.
- Jared Sullivan — state representative.
- David Jarvis — filed and listed in early candidate tracking.
Republican candidates
- Scott Brown — former Massachusetts senator and former ambassador.
- John E. Sununu — former New Hampshire U.S. senator.
Independent / other activity
- Matthew S. Giovonizzi — filed federal candidacy paperwork.