Ohio Electric & Natural Gas Services Major Energy Electric services these listed Utilities in Ohio:   AEP Columbus Southern Power AEP OHIO POWER CO CenterPoint Energy Ohio (Vectren) Columbia Gas of Ohio Cleveland Illuminating Dayton Power and Light OHIO Dominion East Ohio Duke Energy Ohio Ohio Edison Toledo Edison  Environmental Disclosure label: Environmental disclosure label information can be found here:English / Spanish Ready to enroll? Click here. Residents of MA, NJ, OH, PA, MI: Did you know that thanks to deregulation, consumers can often save money on their electric bill?