2024 Oklahoma Republican presidential primary

The 2024 Oklahoma Republican presidential primary was held on March 5, 2024, as part of the Republican Party primaries for the 2024 presidential election. Forty-three delegates to the 2024 Republican National Convention were allocated on a winner-take-most basis. The contest was held on Super Tuesday alongside primaries in 14 other states.

In September 2023, a lawsuit was filed seeking to bar Donald Trump from appearing on the ballot. The Oklahoma Republican Party is defending against the suit and seeking to allow Trump to appear on the ballot, with party chairman Nathan Dahm saying "someone from out of state should not be able to prohibit us, the Republicans, from determining who he wants to vote for president. That should be left up to the Republican voters in this state."

Candidates
The following candidates filed to appear on the Oklahoma Republican presidential primary ballot:
 * Ryan Binkley (withdrew on February 27, 2024)
 * Chris Christie (withdrew on January 10, 2024)
 * Ron DeSantis (withdrew on January 21, 2024)
 * Nikki Haley
 * Asa Hutchinson (withdrew on January 16, 2024)
 * Vivek Ramaswamy (withdrew on January 15, 2024)
 * David Stuckenberg
 * Donald Trump

Results by congressional district
Trump won all five congressional districts. He performed best in the second district, which is both the second-largest and the second-least densely populated one in Oklahoma. Conversely, Nikki Haley earned her best performance in the fifth district, which ranks the second in population density.