Vote-by-mail ballots may also be deposited into secure drop boxes at Supervisors of Elections' main and branch offices until 7:00 pm (local time) on Election Day. Vote-by-mail ballots may also be deposited at secure drop boxes at designated early voting sites in the county. Visit your county Supervisors of Elections' website for the locations, days, and hours of all secure drop boxes in the county. Contact information can be found here.