Electric companies
The Illuminating Company
Part of the FirstEnergy Corporation, the Illuminating Company helps serve more than 700,000 customers in northeast Ohio.
Duke Energy
Duke Energy provides electricity to 7.7 million customers in six states, including Ohio.
Ohio Edison
As part of the FirstEnergy Corporation, Ohio Edison helps serve more than one million customers in northeast and north-central Ohio.
AEP Ohio delivers electricity to more than five million customers in 11 states and owns the nation's largest electricity transmission system.
Toledo Edison
Toledo Edison is part of the FirstEnergy Corporation and helps serve more than 300,000 customers in northwest Ohio.
Commonwealth Edison
ComEd is part of Exelon Corporation, which serves approximately 10 million customers, including more than four million customers across northern Illinois.
Ameren Illinois
As part of Ameren Corporation, Ameren helps serve more than three million customers across a 64,000-square-mile area.
Baltimore Gas & Electric (BGE)
Part of the Exelon Corporation, BGE provides electricity to more than 1.2 million customers in seven counties across the state of Maryland.
Potomac Electric Power Company (PEPCO)
Part of the Exelon Corporation, PEPCO provides electricity service to about 842,000 customers in Maryland and Washington, D.C.
Delmarva Power
As a unit of the Exelon Corporation, Delmarva provides reliable energy to 532,000 customers across Maryland and Delaware.
Potomac Edison
As a FirstEnergy company, Potomac Edison serves thousands of customers with electricity across Maryland.
Public Service Electric & Gas (PSE&G)
Headquartered in Newark, PSE&G supplies electricity to 2.2 million customers in more than 300 communities.
Jersey Central Power and Light
As a FirstEnergy company, Jersey Central Power and Light services millions of customers across New Jersey.
Atlantic City Electric
As a unit of Exelon Corporation, Atlantic City Electric provides safe and reliable energy to 560,000 customers across New Jersey.
PECO
PECO, a subsidiary of Exelon Corporation, is an electric and natural gas utility that serves about 1.6 million electricity customers in Pennsylvania.
Penn Power
Penn Power is a FirstEnergy company that serves more than 160,000 customers across Pennsylvania.
Penelec
Pennsylvania Electric Company (Penelec) is a FirstEnergy company that serves electricity customers in northern and central Pennsylvania.
PPL
PPL Electric Utilities serves about 1.4 million customers in 29 counties in central and eastern Pennsylvania, and maintains about 50,000 miles of power lines.
West Penn Power
West Penn Power is part of FirstEnergy Corporation, an energy company that serves approximately 720,000 electricity customers over a 65,000 square-mile area.
Duquesne Light and Power
Duquesne Light and Power has provided safe and reliable electricity to its 600,000 customers for over a century.
Natural gas companies
Columbia Gas of Ohio
As the largest provider of natural gas service in the state, Columbia Gas of Ohio provides essential electric and natural gas service to nearly 4 million customers.
Dominion Energy
Dominion Energy operates in 16 states offering clean, safe and reliable energy to nearly 7 million customers.
Duke Energy
Duke Energy offers natural gas distribution services to more than 1.6 million customers throughout Ohio, Kentucky, Tennessee and the Carolinas.
Vectren
As a subsidiary of CenterPoint Energy, Vectren provides gas and electricity to more than 1 million customers across Ohio and Indiana.
