March 10th is the official Election Day but you can vote as soon as your ballot arrives. From King County Elections:
King County Elections mailed ballots today, February 19, to over 1.35 million registered voters for the March 10 Presidential Primary. Any voter who has not received their ballot by Monday, February 24 should call King County Elections at 206-296-VOTE (8683).
The Secretary of State mailed voters’ pamphlets last week.
This Presidential Primary will mark the first time in the last four years that voters need to declare a party preference to participate. While Washington voters do not register by party, voters across the state will have to pick a party, check the box, and vote for one candidate from the party they selected. This party preference will remain on the voter rolls for 60 days before being expunged and is publicly disclosable information, per state law.
If you’re not registered, there’s still time – here’s how.