The State of Maine allows residents to register to vote any time leading up to and including Election Day. Residents of Kennebunk may register to vote at the Town Clerk’s Office which is located on the second floor of the Town Hall.
Proof of identity (Driver's License or State ID) and residency needs to be provided at the time of registering. If your Driver's License or State ID has your physical address listed, that is suffice. Otherwise you could bring a utility bill, rental agreement or tax bill as proof of residency.