Tuesday 9 February 2016: Precinct Meetings. The Precinct Meetings elect delegates to the County Conventions.

Tuesday 1 March 2016: 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: Saturday 26 March 2016.
Included in Nationwide vote.

Tuesday 1 March 2016: 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: Saturday 26 March 2016.

Statewide
Cruz: 28 delegates × 158,078 ÷ 459,922 = 9.624 delegates. Round to 10.
Trump: 28 delegates × 130,267 ÷ 459,922 = 7.931 delegates. Round to 8.
Rubio: 28 delegates × 119,633 ÷ 459,922 = 7.283 delegates. Round to 7.
Statewide: The 15% threshold resulted in 3 unbound delegates.

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 12 March 2016: County Conventions. The County Conventions elect delegates to the District and State Conventions.

No later than Saturday 16 April 2016 (presumably): District Conventions Convention. The District Convention meet to elect National Convention district delegates according to the results of the primary.

CD 1: 16 April.
CD 2: 9 April.
CD 3: 2 April.
CD 4: 2 April.
CD 5: 16 April.

Friday 13 May - Saturday 14 May 2016 (presumably): State Convention. The State Convention meets to elect 25 at-large National Convention delegates.

15 January 2015: State Senator Brian Crain (Republican) introduces SB 233. This bill would would move the Presidential Preference Primary from the 1st to the 4th Tuesday in March.