Go to MyTurn.ca.gov or call (833) 422-4255 for the State's COVID-19 vaccine appointment system. You don't need insurance for a COVID vaccine (it's free for everyone), but if you have insurance, have your policy info ready when you go to MyTurn.ca.gov.
Vaccine partners have different appointment systems. The Nevada County Public Health department maintains a list of local vaccine providers serving Nevada County residents. Go to MyNevadaCounty.com/GetVaccinated to learn more.