How to register to vote

You must be a United States citizen. This applies uniformly in federal elections and in every state election. Lawful permanent residents — green card holders — cannot vote in federal or state elections, and registering or voting when not eligible carries serious consequences, including effects on immigration status. A small number of local jurisdictions have permitted non-citizens to vote in strictly local contests, but this is rare and never extends to federal elections.

You must be at least 18 years old by election day. Many states allow you to pre-register at 16 or 17 so that registration activates automatically when you turn 18, which is a useful and underused provision.

You must meet your state's residency requirement, which usually means residing in the state and often in a specific district for a period before the election. Students can generally choose between registering at their home address or their college address, but not both.

Rules for people with felony convictions vary more than any other aspect of eligibility. Some states never remove voting rights, some restore them automatically on release from prison, some on completion of parole or probation, and some require an application. Because this differs so sharply, the only reliable source is your own state's election office.

People declared mentally incapacitated by a court may be ineligible in some states, again depending on state law and the terms of the specific court order.

US citizens living abroad and military personnel serving away from home retain the right to vote in federal elections through an absentee process run under federal law, using their last US address.

Most states let you register online, by mail, or in person. Online registration is generally the fastest and gives you a confirmation, but it typically requires a state-issued driver's licence or ID number, which is why mail and in-person routes remain important for people without one.

The National Voter Registration Act requires that registration be offered at motor vehicle agencies and certain public assistance offices, which is why registering is routinely offered when you get or renew a driver's licence. Some states go further and register eligible people automatically unless they decline.

Deadlines are the part that catches people. Many states close registration a set number of days before an election — commonly two to four weeks — and after that point you cannot register for that election regardless of eligibility. A growing number of states permit same-day registration at early voting sites or on election day, but this is not universal and should never be assumed.

Check your registration status even if you are certain you are registered. States conduct list maintenance and remove records under specific legal conditions, and errors happen. Checking takes a minute and is the single most effective thing you can do well before an election.

Re-register when you move. A registration is tied to an address, and moving — even within the same county — generally requires updating it. Moving to a different state always requires registering afresh. This is the most common reason otherwise eligible people are turned away.

Update your record if you change your name. A mismatch between your registration and your identification can create problems at a polling place, particularly in states with strict identification requirements.

North Dakota is the single exception to all of this: it has no voter registration, and voters establish eligibility with identification at the polling place.

Voter identification is the area where state rules diverge most and where general advice is least useful. Some states require photo identification at the polls. Some accept a broader range of documents including utility bills or bank statements showing name and address. Some request identification but allow alternatives such as signing an affidavit. Some ask for nothing beyond stating your name.

Because the categories themselves differ, the only correct approach is to check what your specific state requires before election day. Your state or county election office publishes the accepted list.

First-time voters who registered by mail face an additional federal requirement in many cases, needing to show identification the first time they vote even in states that otherwise do not require it.

If you arrive without acceptable identification, you can generally cast a provisional ballot. This is a real ballot that is set aside and counted once your eligibility is confirmed, which may require you to return with documentation within a short window. Provisional ballots are a safeguard, not a formality — but they are only counted if you complete whatever follow-up your state requires.

States requiring photo identification are generally obliged to make a free option available to voters who lack one, though the process for obtaining it and the documents needed vary. If you do not have acceptable identification, starting that process well before an election matters, because it often requires a birth certificate or other underlying documents that take time to obtain.

Polling places must be accessible to voters with disabilities under federal law, and accessible voting equipment must be available. Voters who need assistance are generally entitled to bring a person of their choosing, with limited exceptions such as an employer or union representative.

Most states now offer some form of early in-person voting, allowing you to vote at designated locations during a period before election day. Availability, dates and locations vary, and early voting sites are often fewer than election day polling places.

Mail voting rules fall into broad categories. Some states conduct elections primarily by mail and send a ballot to every registered voter automatically. Some allow any registered voter to request a mail ballot without giving a reason. Some require an excuse such as absence, illness or disability. Which category your state falls into determines everything about the process.

If you request a mail ballot, request it early. Postal delivery in both directions takes time, and the most common reason mail ballots are rejected is arriving after the deadline. Note carefully whether your state requires the ballot to be received by election day or merely postmarked by it — the difference is substantial.

Follow the return instructions exactly. Mail ballots are rejected for procedural reasons far more often than for anything substantive: a missing signature, a signature that does not match the one on file, a missing secrecy envelope, or a missing witness signature where a state requires one.

Many states now offer ballot tracking so you can confirm yours was received and accepted. Where a state provides a process to fix a defect — commonly called curing — it usually operates on a short deadline, so tracking is what makes it usable.

Drop boxes and in-person return are available in many states as an alternative to postal return, and eliminate delivery risk entirely.

Overseas and military voters use a dedicated federal absentee process, including a backup ballot that can be used if a requested ballot does not arrive in time.

Federal law does not guarantee time off work to vote, but a majority of states have their own laws requiring it, sometimes with pay and usually with advance notice to the employer. This is a state entitlement worth checking rather than assuming.

If your name is not on the roll but you believe you are registered, ask for a provisional ballot rather than leaving. Poll workers are required to offer one in most circumstances, and it preserves your vote while eligibility is confirmed.

If you are in the wrong polling place, ask where the correct one is. In some states a ballot cast in the wrong precinct is not counted at all, so it is worth the trip.

You are generally entitled to vote if you are in line when polls close. Do not leave a queue because the closing time has passed.

Voter intimidation is illegal under federal law. Aggressive questioning of voters, blocking access, following voters, or threatening them are all prohibited, and the Department of Justice's Civil Rights Division enforces federal voting rights protections including language assistance requirements in certain jurisdictions.

Misinformation about elections circulates heavily, often about dates, locations and eligibility. Deliberately false information about how or when to vote is a known tactic. The only reliable sources are your state or county election office and official government sites — not social media, and not messages forwarded from someone who received them elsewhere.

Your local election office is the single most useful contact for anything specific: registration status, polling location, ballot tracking, accessibility arrangements and identification requirements. It is also the body that can actually fix problems, which no national organisation can do on your behalf.

Sample ballots are published in advance by most election offices. Reviewing one before you vote is worthwhile, since ballots frequently include judicial retention questions, local offices and ballot measures that receive little coverage and that voters often encounter for the first time in the booth.