On 29 June 2022, HB 1878, which repeals the Presidential primary, was signed into law by Governor Michael L. "Mike" Parson (Republican). On 24 April 2023, HB 347, HB 267, SB 602, was defeated 65-56. It would have reinstated the presidential primary election to the 1st Tuesday after the 1st Monday in April (HB 267) or 2nd Tuesday after the 1st Monday in March (SB 602). Hence, the process below is out of date.

Circa March 2024 (date not set): Missouri Primary cancelled by legislation. Delegate Binding: Winner-Take-Most Primary. Voter Eligibility: Modified Primary.

Primary cancelled by legislation (preliminary)
Included in Nationwide vote.

All 54 delegates to the Republican National Convention are allocated to presidential contenders in today's Missouri Presidential Primary.

• If a candidate receives a majority of the statewide vote (more than 50%), the 54 pledged delegates are bound to that candidate.
• If no candidate receives a majority of the vote:
• The candidate with the most votes in each of the state's 8 congressional district receives 3 delegates.
• The candidate with the most votes statewide receives 30 delegates (the 27 at-large and bonus delegates plus the 3 RNC delegates).

Primary cancelled by legislation (preliminary)

Votes cast for any candidate who dies, releases his or her delegates, withdraws, or becomes inactive prior to the primary will not be counted in the calculation.

National Convention delegates are bound on the first ballot unless that candidate dies, releases his or her delegates, withdraws, or becomes inactive.

Participation in the caucuses is limited Republicans who are registered to vote in that county.

Circa April 2024 (date not set): Local Caucuses. Participants elect delegates to the Congressional District Conventions and State Convention.

Circa May 2024 (date not set): Congressional District Conventions. 24 District Delegates (3 from each of the state's 8 Congressional Districts) to the National Convention are elected according to the results of the primary.

Circa June 2024 (date not set): State Convention in St. Charles. 27 (10 At-Large and 17 Bonus Delegates) to the National Convention are elected along with a National Committeeman and National Committee woman according to the results of the primary.