The U.S. state of Oklahoma first required its residents to register their motor vehicles and display license plates in 1915. As of 2024, plates are issued by Service Oklahoma. Only rear plates have been required since 1944.
Prior to July 1, 2019, plates belonged to the car, not the owner. As a result of lost turnpike toll revenue and law enforcement having trouble tracking vehicle owners, the law was changed, meaning plates now belong to vehicle owners and can be transferred from a previous vehicle to a new vehicle.
