County of Sonoma, California
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Register to Vote

Permissible Uses of Personal Information

Pursuant to California Elections Code § 2157.2, information on your voter registration affidavit will be used by elections officials to send you official information on the voting process, such as the location of your polling place and the issues and candidates that will appear on the ballot. Commercial use of voter registration information is prohibited by law and is a misdemeanor. Voter information may be provided to a candidate for office, a ballot measure committee, or any other person for election, scholarly, journalistic, political, or governmental purposes, as determined by the Secretary of State. Driver’s license and social security numbers, or your signature as shown on your voter registration card, cannot be released for these purposes. If you have any questions about the use of voter information or wish to report suspected misuse of such information, please call the Secretary of State’s Voter Protection and Assistance Hotline.

Certain voters facing life-threatening situations may qualify for confidential voter status. For more information, please contact the Secretary of State’s Safe At Home program or visit the Secretary of State’s Web site at

Registration Requirements

To register, you must meet the following criteria:

  • You are a United States citizen and a resident of California.
  • You are a resident of California.
  • You are at least 18 of age or older on or before Election Day.
  • You are not currently imprisoned or on parole for the conviction of a felony.
  • You have not been found mentally incompetent by a court of law.

You must re-register any time you change your name, residence address, or political party. Please notify the Registrar of Voters Office of any change to your mailing address (if different from your residence address).

Registration Deadlines

You must be registered 15 days prior to an election to be eligible to vote; for new U.S. citizens there is an exception.

If you are a new resident to California and established residency after the 15-day deadline to register for a general election, you are eligible to vote for President and Vice President only. New residents must register at the Registrar of Voters office between the 14th and 7thbefore Election Day and vote their ballots at the Registrar of Voters Office.

New Voter Registration Requirements

Voter registration requirements were changed by the Help America Vote Act of 2002 (HAVA). Persons who register or re-register to vote after January 1, 2006, are required to include on their voter registration affidavits a California driver’s license number, if they have a current and valid driver’s license, or a California identification card number if they have one, or, if they have neither a driver’s license nor a California ID, the last four (4) digits of their Social Security number, if they have such a number. If a person does not possess a driver’s license, state-issued identification card, or Social Security card, he or she will still become a registered voter; however, if this information is available, it must be provided.

First-Time Federal Voters

In federal elections only, any person who registers to vote for the first time by mail and does not provide a California driver’s license number, California identification card number, or the last four (4) digits of his/her Social Security number on the voter registration affidavit will be asked to show a form of accepted identification at the polls prior to being allowed to vote, or to provide a copy of that identification with his or her Vote-by-Mail ballot. If this information cannot be provided at the polls, the voter will be allowed to vote a provisional ballot. There are 30 forms of identification that can be used for voting purposes under HAVA. For further information, please refer to the full list of accepted forms of identification.

Registration Forms

You may obtain a Registration Form from the following offices: