The New York Times: “Election Day is Nov. 6, but voter registration deadlines in many states are well before that. Deadlines have already passed in Alaska and Rhode Island. Many more are close. Here’s a list of each state’s voter registration deadline. The mail deadlines are when the applications should be postmarked, unless stated otherwise. Some states allow you to register through Election Day, but may have special requirements to do so.

• Registered already? Here is a list of states that allow early voting.