As of 2024, 36 states had laws requesting or requiring voters to show identification at the polls, according to the National Conference of State Legislatures.
A 2024 Pew Research Center survey found 81 percent of Americans favored requiring all voters to show government-issued photo ID.
A 2006 report from the Brennan Center for Justice estimated that approximately 11 percent of U.S. citizens, or roughly 21 million people, lacked current government-issued photo identification.
The Help America Vote Act of 2002 requires first-time voters who registered by mail to show ID, but federal law does not require ID for all voters.
A 2014 Government Accountability Office study found voter ID laws in Kansas and Tennessee were associated with turnout decreases of 1.9 to 3.2 percentage points relative to comparison states.