The Delaware Senate Primary Election on September 12, 2026, will determine the Democratic and Republican nominees for one of Delaware's two U.S. Senate seats. Voters will select candidates to appear on the general election ballot for the federal Senate race, with the winner advancing to contest the seat in November 2026.
The Delaware Senate Primary Election on September 12, 2026, will determine the Democratic and Republican nominees for one of Delaware's two U.S. Senate seats. Voters will select candidates to appear on the general election ballot for the federal Senate race, with the winner advancing to contest the seat in November 2026.
To vote in Delaware's 2026 primary, residents must be registered Democrats or Republicans, as Delaware has closed primaries. Voters can register online through the Delaware Department of Elections website, by mail, or in person at their county elections office. Registration must be completed by August 22, 2026. Early voting begins August 30 and runs through September 8, 2026, at designated polling places. On Election Day, polls are open from 7:00 AM to 8:00 PM. Voters must present a valid photo ID, such as a Delaware driver's license, state ID, or U.S. passport, to cast their ballot.