 Ballots for Washington's primary and special election go in the mail this week. If registered voters don't receive a ballot by July 25th, you'll want to contact your county elections office. The last day to submit new voter registrations and voter updates online or by mail to existing registrations is 5 p.m. July 29th. You can register in person up to Election Day. Ballots need to be postmarked August 6th or placed in an elections drop box by 8 p.m. that day.