Those intent on voting on election day must be registered by Oct. 9. Early in-person voting begins Oct. 15. ... Those wishing to make any changes via mail must submit required documentation postmarked Oct. 9 at the latest. Residents can register to vote at the board’s office at 4380 Memorial Drive in Decatur from 8 p.m. to 5 p.m.For all information relating to voting, visit the State of Georgia's Elections Page.