The County Clerk also serves as the County Election Officer. Qualified persons may register at the Sumner County Clerk's Office in Wellington, at the City Clerk's offices in Argonia, Belle Plaine, Caldwell, Conway Springs, Geuda Springs, Hunnewell, Mayfield, Milan, Mulvane, Oxford, South Haven or Wellington.
Registration is also available at various State agencies.
Registration closes 14 days prior to any election, and reopens the day after the election. A voter must re-register if the voter moves. A voter who fails to vote in a November general election should contact the election office to determine if it is necessary to re-register. A voter may declare a party affiliation at the time of registration, or may sign a declaration at the voting place during a primary election is registered as unaffiliated. A voter may also choose not to be affiliated with any political party.