Voter Registration

Hand dropping ballot in ballot box.

Registration is permanent and a new affidavit of registration need only be executed if you have changed your name, address or wish to change your political party affiliation.

Polls are open from 7 a.m. to 8 p.m. on Election Day. In order to vote in any specific election, you must be registered 15 days prior to the election.

You are eligible to register to vote if you are:

  • A citizen of the United States and a resident of California
  • 18 years of age or older on Election Day
  • Not currently in prison, or on parole, serving state prison sentence in a county jail, or serving sentence for a felony
  • Not found to be mentally incompetent by a court of law


Same Day Voter Registration, known as Conditional Voter Registration in state law, is a safety net for Californians who miss the deadline to register to vote or update their voter registration information for an election.

If you need to register or re-register to vote within 14 days of an election, this process can be completed to register and vote at the Sonoma County Registrar of Voters office, polling place, or vote center. Your ballot will be processed and counted once the county elections office has completed the voter registration verification process.

Visit for a list of early voting locations where you can complete the Same Day Voter Registration Process.


To pre-register to vote in California, you must:

  • Be 16 or 17 years old
  • A United States citizen and a resident of California
  • Not currently in state or federal prison or on parole for the conviction of a felony
  • Not prohibited from voting by a court because of mental incompetency.

You will automatically be registered to vote on your 18th birthday. To pre-register click here.

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