Yes, In California, you have the right to vote while you are on parole, probation, PRCS, or mandatory supervision. You must be a United States citizen, a resident of California, and at least 18 years of age. To vote in the next election, you must register to vote at least 15 days before the election.
For more information, contact the Humboldt County Office of Elections and Voter Registration at
2426 6th Street
Eureka, CA 95501
More Info: California Secretary of State: Voting Rights for Californians with Criminal Convictions or Detained in Jail or PrisonSec of State's Voting Rights-Incarcerated Persons