AEP Ohio serves nearly 1.5 Million customers in Ohio. We provide power to nearly 1,000 communities located in 61 of the states 88 counties. Our headquarters is in Gahanna, Ohio with regulatory and external affairs offices in downtown Columbus. A subsidiary of American Electric Power (AEP) and the largest of its regional utility divisions AEP Ohio consists of the Ohio Power Company. AEP Ohio is part of the American Electric Power System one of the largest electric utilities in the United States delivering to more than 5 million customers in 11 states.