You can register to vote on Election Day here

On Election Day, it may seem too late to register to vote for the first time, but about half of states allow potential voters to do just that.

About two dozen states and two territories offer same-day registration, allowing voters to complete their registration and cast their ballot at the same time. In one state, North Dakota, registration is not required at all, allowing any eligible voter to show up and vote on Election Day.

The states and territories with same-day registration are Alaska, California, Colorado, Connecticut, Hawaii, Idaho, Illinois, Iowa, Maine, Maryland, Michigan, Minnesota, Montana, Nevada, New Hampshire, New Mexico, Puerto Rico, Rhode Island, Utah, Vermont, Virginia, Washington, Wisconsin, Wyoming and Washington, DC

Voters in the remaining states will only be able to vote on Election Day if they have registered before their state's deadline.

Same-day registration rules can vary significantly between states. In most cases, voters can register and vote at their assigned polling station. But a handful of states, including Michigan and Montana, require them to go to a local election office to register. Alaska and Rhode Island only offer same-day registration for the presidential election. Anyone who wants to take part in state or local elections must register in advance.

Voters who want to register on election day usually also have to bring documents with them that they would not need if they were just voting. This often includes proof of residency, such as a utility bill, and a valid ID, even in states that don't have strict voter ID laws.