Monday is the last day to register to vote in the June 5 statewide primary election.
To vote, a person must be a California resident, at least 18 years old by Election Day and not be in prison or on parole for a felony conviction.
People who have moved or changed their name must re-register to vote, according to the Contra Costa County elections office.
People can register to vote at online or fill out a paper card available at any City Hall, post office, library or election office.
California residents can check their voter registration status, polling place, mail-in ballot status and more by going to their county web page.