Secretary of State Delbert Hosemann says petitioners gathered more than enough signatures to put a voter ID initiative on Mississippi's ballot in November 2011.
Hosemann said Monday his office had determined that 131,678 signatures of registered voters were collected. That's significantly more than the minimum 89,285 needed.
Republican organizers submitted the signatures last month, and the secretary of state's office spent weeks double-checking the numbers.
Mississippians will be asked to decide whether the state constitution should be amended to require each voter to show a government-issued photo identification at the polls.
Supporters say voter ID would help deter fraud, while opponents say it could decrease turnout among older black voters who were once subject to Jim Crow laws.