Nundina › Discover calendars › US Primaries 2026 calendar › 🗳️ South Dakota: 2026 Runoff🗳️ South Dakota: 2026 Runoff28 July 2026Only if a candidate fails to clear 35% (congressional/gubernatorial primaries only). Verified via 270toWin/NCSL 2026 State Primary Calendar, 2026-07.US Primaries 2026 calendarMore from this calendar

15 September 2026 - 🗳️ Delaware: 2026 Primary

9 September 2026 - 🗳️ Rhode Island: 2026 Primary

8 September 2026 - 🗳️ New Hampshire: 2026 Primary

1 September 2026 - 🗳️ Massachusetts: 2026 Primary

25 August 2026 - 🗳️ Oklahoma: 2026 Runoff