The research conducted by the non-partisan Pew Centre on the States also revealed that one in every eight voter records contains inaccuracies, and at least 51 million eligible voters are not registered to take part in elections.
The study comes as the United States prepares for presidential and congressional elections in November.
“Voter registration is the gateway to participating in our democracy, but these antiquated, paper-based systems are plagued with errors and inefficiencies,” said David Becker, director of Election Initiatives at Pew.
“These problems waste taxpayer dollars, undermine voter confidence and fuel partisan disputes over the integrity of our elections.”
Of the approximately 24 million incorrect voter registrations across the country, or 13 percent of the national total, more than 1.8 million of those are for people who are deceased, the study found.