Your ballot has a deadline. Actually, four of them.
In the United States you don’t just vote — you register first, and each method (mail, online, in-person, same-day) closes on a different day. Slide the countdown below to see which doors are still open, then learn the federal rules that decide who stays on the rolls.
Drag to rotate · gates close as the marker passes them
The deadline map (typical rules)
Deadlines are set state by state, but they cluster: the strictest states close mail registration ~30 days out (postmark rules vary), most online and in-person windows close 15–22 days out, and about 23 states plus D.C. allow same-day registration — you register and vote in one visit, usually with proof of residence. North Dakota is the outlier: it has no voter registration at all.
Why people fall off the rolls: under the National Voter Registration Act of 1993, states must maintain accurate lists. You can be moved to “inactive” after mail bounces or an address-confirmation notice goes unanswered — and removed only after you then skip two consecutive federal general elections. Moving, changing your name, or a clerical mismatch are the most common reasons a valid voter shows up as unregistered.
Check yourself: three-question quiz
1. Can a state remove you from the rolls just because you skipped one election?
2. Which state requires no voter registration at all?
3. Roughly how many states (plus D.C.) offer same-day registration?