The 2026 U.S. Senate primary election in Washington will be held on August 4, 2026, to select nominees for the general election. Voters will choose candidates to succeed Senator Maria Cantwell, who is not seeking re-election, making this an open race for Washington's Class I Senate seat.
The 2026 U.S. Senate primary election in Washington will be held on August 4, 2026, to select nominees for the general election. Voters will choose candidates to succeed Senator Maria Cantwell, who is not seeking re-election, making this an open race for Washington's Class I Senate seat.
Washington conducts all elections by mail, with ballots automatically mailed to registered voters. Voters can return ballots via mail, drop box, or in-person at voting centers. Registration can be completed online, by mail, or in person, and voters must be U.S. citizens, Washington residents, and at least 18 years old by Election Day.