Only voters who are registered in the Republican Party are eligible to vote in the Republican Presidential Primary.

Tuesday 19 March 2024: Arizona Primary. Hours 6:00a-7:00p MST (1300-0200 UTC). Delegate Selection: Winner-Take-All Primary. Voter Eligibility: Closed Primary.

Primary (preliminary)
Included in Nationwide vote.
Estimate updated 23 March 2024 01:45p EDT.

All of 43 of Arizona's delegates to the Republican National Convention are pledged to the presidential contender receiving the greatest number of votes in today's Arizona Presidential Primary.

No later than Sunday 7 April 2024 County and Legislative District Meetings: The Arizona Legislative District and County Conventions elect delegates to the State Convention and Congressional District caucuses. The meetings are held at least 20 days prior to the state convention.

Saturday 27 April 2024: The Arizona State Convention convenes. Delegates are elected according to the results of the primary.

• 27 district delegates to the Republican National Convention are chosen with 3 delegates selected in each of the 9 congressional districts.
• The State Convention chooses 13 at-large delegates from Arizona to the Republican National Convention.

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

Delegate candidates are required to pre-register and when they do so they must declare which candidate they are pledged to support or "No Preference". The pledge is terminated if the nominee publicly announces that they have terminated their campaign and that they are releasing their delegates.

... each delegate to the national convention shall vote for the party's presidential nominee candidate who received the greatest number of votes in the presidential preference election ..., until the candidate releases the delegate from the delegate's obligation, until a candidate withdraws from the race or until one convention nominating ballot has been taken. After a candidate is nominated, withdraws from the race, delegates are released or one ballot is taken, each delegate is free to vote as the delegate chooses .... [Arizona Revised Statutes 16-243]

26 August 2023: The Maricopa County Republicans requested that the state Party withdraw from the state run 2024 Presidential Preference Primary by 1 September and replace the election with a party run Presidential Preference Primary.

1 September 2023: The Republican Party rejected the Maricopa County proposal. Party Chair Jeff DeWit said the organization does not have the money, manpower, or infrastructure to conduct a party run primary involving 1.4 million voters.