Sample ballots, registration, and info for April 6 elections Pottawatomie County Election Board Voter registration deadline approaches Friday, March 12 will be the last day to apply for voter registration in order to be eligible to vote in the April 6 Board of Education and Municipality General Election, Pottawatomie County Election Board Secretary Jeannie Stover said. Stover said that persons who are United States citizens, residents of Oklahoma, and at least 17 ½ years old are eligible to apply for voter registration. However, you must be at least 18 years old to vote. Applications must be received by the county election board or postmarked no later than midnight, March 12. Applications postmarked after that time will be accepted, but will not be processed until after the April 6 election.