2024 Colorado Republican presidential primary

The 2024 Colorado Republican presidential primary was held on March 5, 2024, as part of the Republican Party primaries for the 2024 presidential election. 37 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. Donald Trump won in 57 of the counties. Nikki Haley won the majority of the vote in seven counties. The counties Nikki Haley won were Denver, Boulder, Summit, Pitkin, Routt, San Miguel, and San Juan.

Attempted disqualification of Trump
On December 19, 2023, the Colorado Supreme Court reversed a lower court decision that the president of the United States is not an Officer of the United States while upholding the other court's holding that former President Donald Trump had engaged in insurrection by inciting the January 6 United States Capitol attack, and was thus disqualified from the presidency under Section 3 of the 14th Amendment and ordered that Trump be removed from the 2024 Colorado Republican presidential primary ballot. The Colorado Republican Party appealed to the United States Supreme Court on December 27, thus putting the state courts decision is on hold until the ruling of the United States Supreme Court. The disqualification was also appealed to the United States Supreme Court by Trump's legal counsel on January 3. Colorado Secretary of State Jena Griswold confirmed on January 5 that Trump was on the Republican ballot. The Supreme Court ruled on March 4 that Trump would not be removed from the ballot.