About Public Service Company of Oklahoma
Public Service Company of Oklahoma (PSO) has served Oklahoma's electric energy needs since the company's incorporation in May 29, 1913.
PSO today serves approximately 540,000 customers in 232 cities and towns across 30,000 square miles of eastern and southwestern Oklahoma. PSO is headquartered in Tulsa, with regulatory and external affairs offices in Oklahoma City. The company's distribution operations are organized into three districts: Tulsa, Lawton, and McAlester.
PSO is part of the American Electric Power system (AEP), which is one of the largest electric utilities in the United States, delivering electricity to more than 5.3 million customers in 11 states. AEP ranks among the nation’s largest generators of electricity, owning nearly 32,000 megawatts of generating capacity in the U.S.
AEP also owns the nation’s largest electricity transmission system, a 40,000-mile network that includes more 765 kilovolt extra-high voltage transmission lines than all other U.S. transmission systems combined. AEP’s transmission system directly or indirectly serves about 10 percent of the electricity demand in the Eastern Interconnection, the interconnected transmission system that covers 38 eastern and central U.S. states and eastern Canada, and approximately 11 percent of the electricity demand in ERCOT, the transmission system that covers much of Texas.
AEP’s utility units operate as AEP Ohio, AEP Texas, Appalachian Power (in Virginia and West Virginia), AEP Appalachian Power (in Tennessee), Indiana Michigan Power, Kentucky Power, Public Service Company of Oklahoma, and Southwestern Electric Power Company (in Arkansas, Louisiana and east Texas). AEP’s headquarters are in Columbus, Ohio.
In 1978, PSO completed renovation of the downtown structure that had served as Tulsa's Central High School building for 60 years, transforming it into PSO's headquarters office.
The Tulsa Foundation for Architecture later presented its Landmark Award to PSO for preserving the historic building, and giving it new life as the company's headquarters.