Saturday 13 January 2024: Precinct Caucuses. Republican Party Caucuses meet in each precinct to elect delegates to the County Convention or Legislative District Caucuses [WSRP rules 14, 15, 16]. The County Conventions will, in turn, choose delegates to the State Convention.

Saturday 20 January - Saturday 16 March 2024: Republican Party County Conventions and Legislative District Caucuses convene to elect delegates to the State Convention. [WSRP rule 19].

Voters must sign a political party declaration on the ballot return envelope and that declaration must match the voted candidate's political party. Participation will be by mail in ballot. "I declare that I am a Republican and I have not participated and will not participate in the 2024 precinct caucus or convention system of any other party." Washington has same day voter registration and does not have party registration.

Tuesday 12 March 2024: Washington Primary. Hours reportedly 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 Binding: Combined Selection Statewide: Proportional, District: Winner-Take-Most Primary. Voter Eligibility: Closed Primary.

Primary (preliminary)
Included in Nationwide vote.

All 43 of Washington's delegates to the Republican National Convention are allocated to presidential contenders based on the results of the voting in today's Presidential Primary.

• Each of the state's 10 congressional districts is allocated 3 delegates.
• If a candidate receives a majority of the vote or only 1 candidate receives 20% of the vote, that candidate receives all 3 delegates.
• If there are 2 candidates who receive at least 20% of the primary vote, then the top vote getter will be allocated 2 delegates and the other candidate will be allocated 1 delegate.
• If no candidate receives at least 20% of the vote or more than 2 candidates receive at least 20% of the vote, then the top three vote getters each receive 1 delegate.
• 13 at-large delegates (10 base at-large delegates plus 0 bonus delegates plus 3 RNC delegates) are allocated proportionally based on the statewide vote. At-Large candidates must receive at least 20% of the total statewide vote in order to be allocated delegates.
• Allocation is in proportion to the total statewide vote NOT the total vote of those candidates receiving 20% or more of statewide vote.
• Compute the number of delegates allocated to each Presidential candidate: 13 delegates × candidate's vote ÷ total statewide vote. Round to the nearest whole number.
• If more than 13 delegates are allocated, subtract 1 delegate from the candidate or candidates furthest from the rounding threshold until 13 delegates have been allocated.
• If fewer than 13 delegates are allocated (due to the 20% threshold or rounding), those delegates become unbound.

Primary (preliminary)

Delegates are bound by the primary results only on the first ballot. If no candidate receives the majority ... on the first ballot, ... delegates will vote as they choose on successive ballots.

3 party leaders, the National Committeeman, the National Committeewoman, and the chairman of the Washington's Republican Party, will attend the convention as bound delegates by virtue of their position.

Thursday 18 April - Saturday 20 April 2024: The Washington Republican State Convention (consisting of 1,500 delegates, 1,500 alternates, and the automatic delegates) convenes [WSRP rule 36]. National Convention delegates are elected according to the results of the primary.