Monday, May 21, is the deadline to register to vote for the 2018 primary election on June 5. Voters who are already registered should re-register to vote if they have changed their name, address, or party affiliation. Residents may register to vote online at SBCountyElections.com. Voter registration applications are also available at post offices, city clerks’ offices, county libraries, and the Department of Motor Vehicles. Mailed voter registration applications must be postmarked no later than Monday.