The filing deadline for the Illinois Republican presidential primary passed on Jan. 5, 2024. Five candidates filed to appear on the March 19, 2024, ballot. In order to file, candidates had to submit a petition containing 3,000 signatures.
The following candidates filed:
- Ryan Binkley
- Former New Jersey Governor Chris Christie
- Florida Governor Ron DeSantis
- Former U.N. Ambassador and South Carolina Governor Nikki Haley
- Former President Donald Trump