To register to vote in the U.S., you generally need to be a U.S. citizen, be at least 18 years old by Election Day, and meet your state’s residency rules. In most states, you’ll also need some form of identification information, and the exact documents required can vary by state.

What is usually required

  • U.S. citizenship.
  • Age 18 or older by Election Day; some states allow preregistration if you are younger.
  • Residency in the state, and sometimes in the local community, where you want to vote.
  • A state-specific registration form, submitted online, by mail, or in person depending on your state.

ID and documents

  • Many states ask for a driver’s license or state ID number.
  • If you do not have one, you may be able to use the last four digits of your Social Security number in many states.
  • Some states require extra proof, such as residency or citizenship documents in specific situations.

Timing

  • Every state has its own voter registration deadline.
  • Some states let you register on Election Day, while others close registration days or weeks before the election.
  • If you move, change your name, or change party affiliation, you should update your registration.

Practical next step

The simplest path is to start at vote.gov, select your state or territory, and follow the instructions for online, mail, or in-person registration.

For this kind of question, the exact requirements depend on the state, so the state election office rules are the final word.