Saturday 22 February - Saturday 21 March 2020 (presumably): Precinct Meetings. The Precinct Meetings elect delegates to the County Conventions.

Tuesday 3 March 2020 (presumably): Oklahoma Primary. Hours 7:00a-7:00p CST (1300-0100 UTC). Delegate Selection: Winner-Take-Most Primary. Voter Eligibility: Closed Primary.

Primary
Source: Oklahoma State Election Board.
Status: Official. Retrieved: Sunday 5 April 2020.
Included in Nationwide vote.
As of 1 May 2020 02:13 EDT.

All 43 of Oklahoma's delegates to the Republican National Convention are allocated to presidential contenders in today's Oklahoma Presidential Primary. [Rule 18(h)]

• The 15 district delegates are allocated to presidential contenders based on the primary results in each of the 5 congressional districts: each congressional district is assigned 3 National Convention delegates.
• If one candidate receives more than 50% of the vote or only one candidate receives 15% or more of the vote, that candidate receives 3 delegates.
• Otherwise, if exactly 2 candidates receive 15% or more of the vote, the candidate receiving the most votes receives 2 delegates and the candidate receiving the second most votes receives 1 delegate.
• Otherwise, if 3 or more candidates receive 15% or more of the vote, the top 3 vote-getters each receive 1 delegate. (no information on what happens should no candidate receive at least 15% of the vote.)
• If one candidate receives more than 50% of the statewide vote, that candidate receives all of the state's 28 (10 at-large, 15 bonus, 3 RNC) at-large delegates. Otherwise, the 28 at-large delegates are proportionally allocated to those candidates receiving 15% or more of the total statewide vote. The allocation is in proportion to the total statewide vote NOT the total vote of those candidates receiving 15% or more of statewide vote. The remaining delegates are unbound. Round fractions to the nearest whole number. (no information on what to do if the rounding results in 1 too many or what happens should no candidate receive at least 15% of the vote.)

Primary
Source: Oklahoma State Election Board.
Status: Official. Retrieved: Sunday 5 April 2020.
As of 1 May 2020 02:13 EDT.

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

Delegates are bound until released. "Each delegate ... to the national convention ... shall cast their vote on all ballots for the candidate ... If that candidate is ... no longer a candidate, the votes ... shall be cast for any candidate of their choice." [Oklahoma Statutes §26-20-104 G.]

No later than Saturday 21 March - Saturday 4 April 2020 (presumably): District Conventions Convention. The District Convention meet to elect National Convention district delegates according to the results of the primary.

CD 1: 28 March 2020.
CD 2: 28 March 2020.
CD 3: 4 April 2020.
CD 4: 21 March 2020.
CD 5: 4 April 2020.

No later than Circa March 2020 (date not set): County Conventions. The County Conventions elect delegates to the District and State Conventions.

Friday 1 May - Saturday 2 May 2020 (presumably): State Convention. The State Convention meets to elect 25 at-large National Convention delegates.