Probably. To vote in the state of California, you must be at least 18 years old and a state resident. You can even vote while you are still on probation. However, you cannot vote if you are in prison; on parole; currently serving a local state prison sentence in county jail; currently serving a “split” sentence (this is sometimes called “Mandatory Supervision”); or on Post Release Community Supervision.
For more information about where you can pick up an application to register to vote, or to register to vote online, go to: http://registertovote.ca.gov/