The Libertarian Party has its own presidential primary in Califoria, to be held March 5. The only name on that ballot is Charles Ballay. However, California counts write-ins in presidential primaries for declared presidential write-in candidates. Chase Oliver has already filed as a declared write-in candidate. It is not known if others will also file. The deadline for doing that is February 13.
At the January 5, 2024 California registration tally, there were 240,770 registered Libertarians. Registered independents can also vote in the Libertarian primary.