California Covid-19 vaccination for non-resident non-citizen

Yes, it’s definitely possible. During the initial vaccination wave in 2021 absolutely everyone were allowed to get vaccinated, with absolutely no stipulation on immigration status. My own parents got vaccinated and boosted this way, while simply on a tourist visa.

So just show up for the appointment and you’ll get your shot, no questions asked.

The State of California doesn't condition COVID-19 vaccine eligibility neither on ability to pay nor on any immigration status. Anyone can make an appointment and be vaccinated.

See here for immigration status:

Do I have to be a California resident to schedule a COVID-19 vaccine on My Turn?

No. Scheduling or finding an appointment on My Turn and receiving a COVID-19 vaccine is not based on residency or immigration status.

See here for costs:

Can I Get the COVID-19 Vaccine Without Insurance?

If you’re part of the nearly 8% of Californians that are uninsured, you may worry that lack of insurance will create a barrier to getting the vaccine. A lack of insurance can make affordable health care inaccessible in many instances. Fortunately, that is not the case when it comes to the COVID-19 vaccine. Because the virus is considered a public health crisis, special measures have been put in place to ensure all people can get the vaccine.