Same-day voter registration

Same-day registration, sometimes called Election Day registration, lets eligible citizens register to vote and cast a ballot at the same time, usually at an early-voting site or polling place, rather than by an earlier deadline. Many states and the District of Columbia allow it, in various forms, and the rules differ on whether it applies during early voting and on Election Day.

Voters typically show proof of identity and residence, and some states have additional steps such as casting a provisional ballot or verification afterward. Election administrators must manage larger lines and the check of records against statewide databases, which add work to the process.

Supporters argue that it raises turnout, in particular among younger and mobile voters, and reduces provisional ballots caused by registration errors. Opponents say that it makes it harder to verify eligibility and detect duplicate registrations before votes are cast, increases strain on poll workers and can create opportunities for fraud, a concern often paired with demands for Voter ID. Research indicates turnout effects are modest. It differs from automatic voter registration, where the state adds eligible people to the rolls, and relates to voter roll maintenance.