Participation in Washington State's delegate selection process is open to all voters who wish to participate as Democrats. Participation will be by mail in ballot. For a ballot to be counted in the Democratic primary, the voter must subscribe to a declaration that the voter is a Democrat and that their participation is a matter of public record. Washington has same day voter registration.

Tuesday 10 March 2020: Washington Primary. Hours end at 8:00p PDT (0300 UTC). Washington votes by mail. Ballots must be postmarked on or before Election Day, or dropped off in a designated ballot box by 8 p.m. local time on Election Day. Delegate Pledging: Proportional Primary. Voter Eligibility: Closed Primary.

Primary
Source: Washington Secretary of State.
Status: Official. Retrieved: Thursday 26 March 2020.
Included in Nationwide vote.

89 of 109 delegates to the Democratic National Convention are pledged to presidential contenders based on the results of the voting in today's primary. A mandatory 15 percent threshold is required in order for a presidential contender to be pledged National Convention delegates at either the congressional district or statewide level. How the Democratic Proportional Delegate Allocation Math works.

• 58 district delegates are to be pledged proportionally to presidential contenders based on the primary results in each of the State's 10 congressional districts.
• 31 delegates are to be pledged to presidential contenders based on the the statewide primary results.
• 12 Pledged PLEOs
• 19 at-large National Convention delegates

Primary
Source: Washington Secretary of State.
Status: Official. Retrieved: Thursday 26 March 2020.

Sunday 26 April 2020: Legislative District Caucuses. Hours begin at 1:00p PDT (2000 UTC).

Legislative district caucuses meet to elect delegates to the Congressional District caucuses and State Convention.

A county that is wholly within a legislative district may choose its delegates to the state convention and the congressional district caucuses at the county convention. A county that is in more than one legislative district may choose its delegates to the state convention and the congressional district caucuses at legislative district caucuses during the county convention.

Sunday 3 May 2020: County Conventions. Hours begin at 1:00p PDT (2000 UTC).

County Conventions meet to elect delegates to the Congressional District caucuses and State Convention. They also adopt county platforms and resolutions.

Saturday 30 May 2020: Congressional District Caucuses. National Convention District Delegates are elected based on the results of the of the Primary.

Saturday 13 June - Sunday 14 June 2020: State Convention / State Party Committee.

National Convention Pledged PLEO and At-Large delegates are elected at the State Convention by the State Party Committee. These delegates are pledged to presidential contenders based on the results of the Primary.

The remaining 20 National Convention delegates consist of

• 20 Unpledged PLEO delegates:
• 10 Democratic National Committee members.
• 9 Members of Congress (2 Senators and 7 Representatives).
• 1 Governor.
• 0 Distinguished Party Leaders.

These 20 delegates and will go to the Democratic National Convention officially "Unpledged".