Voter registration in the United States

Voter registration in the United States is required for voting in federal, state and local elections. The only exception is North Dakota, although cities in North Dakota may register voters for city elections.^[1] Voter registration takes place at the county level in many states and at the municipal level in several states. Most states set cutoff dates for voter registration and to update details, ranging from 2 to 4 weeks before an election; while a third of states have Election Day or "same-day" voter registration which enables eligible citizens to register or update their registration when they vote before or on election day.

It has been argued that some registration requirements deter some people (especially disadvantaged people) from registering and therefore exercising their right to vote, resulting in a lower voter turnout. Several consequences of registering for voting are mentioned sometimes as deterrents for registration, like to serve jury duty, to be drafted into the military, or to update car insurance in case of changing address of residence, for example. But many of these claims are false or, like being listed as potential juror, are only applicable to certain jurisdictions or are not the only way to be called in to serve.^[2]

According to a 2012 study, 24% of the voting-eligible population in the United States are not registered to vote, equaling some 51 million U.S. citizens.^[3][4] While voters traditionally had to register at government offices by a certain period of time before an election, in the mid-1990s, the federal government made efforts to facilitate registering, in an attempt to increase turnout. The National Voter Registration Act of 1993 (the "Motor Voter" law) requires state governments to either provide uniform opt-in registration services through drivers' license registration centers, disability centers, schools, libraries, and mail-in registration, or to allow Election Day voter registration, where voters can register at polling places immediately prior to voting. In 2016, Oregon became the first state to make voter registration fully automatic (opt-out) when issuing driver licenses and ID cards, since followed by 15 more states and the District of Columbia. Political parties and other organizations sometimes hold "voter registration drives", that is, events to register new voters.

In 31 states and the District of Columbia, persons registering to vote may at the same time declare an affiliation with a political party.^[5]