Mover's Guide: Missouri
Elections Division: 800-NOW-VOTE (669-8683)
I moved from the address at which I am registered. What should I do?
I moved from another state.
If you moved to Missouri from another state, you must register to vote in Missouri to be able to vote. The last day to register in time to vote in the next election is by 5 p.m. on the fourth Wednesday before Election Day.
If you moved from out of state, you may register to vote the same day you become a resident of the State of Missouri. And, under federal law, if you move within thirty days of a presidential election, you are allowed to vote for President and Vice President in your former state of residence, either in person or by absentee ballot.
I moved within Missouri.
If you moved within your county, you will need to update your address, but you can do this at the polls on Election Day. If you moved to a different county, you should complete a new registration form to update your registration records. That form is available here: http://www.sos.mo.gov/elections/faqs.asp#a1_3
The election is right around the corner and I never updated my registration from my previous address. What should I do?
Many Missouri registered voters who move are still entitled to cast a ballot that will be counted — even if they did not notify the appropriate election official about the move before Election Day.
Scenario One: New Address, but Same Polling Place
If you moved to a new address that is covered by the same polling place as your old address, you can vote a regular ballot at that polling place after confirming your change of address at the polling place. This is true regardless of how close to the election you moved.
Scenario Two: New Address in Same County but New Polling Place
If you moved to a new address within the same county but in a different polling place, you can change the address on your voter registration records and vote a regular ballot at the polling place on Election Day for your new address or at a central polling place after confirming your new address.
Scenario Three: New Address in New County
If you moved to a new address in a different county after the registration deadline, you can vote in that election by limited absentee ballot for presidential and vice presidential electors, United States senators and Congressional representatives, and statewide candidates and issues. You need to apply for absentee ballots in person at the office of the election authority for your new county by 7:00 PM on the day of the election.
If you moved to a new address in a different county before registration deadline, you should complete a new registration form to update your registration records with your new address to be able to vote in the upcoming election.
 Mo. Ann. Stat. § 115.279(8); Missouri Secretary of State, Frequently Asked Questions, http://www.sos.mo.gov/elections/faqs.asp#a1_3 (last visited June 3, 2010).
 Mo. Ann. Stat. §§ 115.135(3), 115.275(3); Missouri Secretary of State, Frequently Asked Questions, http://www.sos.mo.gov/elections/faqs.asp#a1_3 (last visited June 3, 2010).