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Learn About Ameren Electric and Gas Delivery

  • Headquarters: St. Louis, Missouri
  • Founded: 1995
  • Markets served: Illinois, Missouri
  • See how Ameren Illinois is active in its communities.
  • Read the latest about Ameren in the news.

Ameren is an electricity and natural gas utility that serves both Illinois and Missouri. Throughout its 64,000 square-mile service territory, Ameren has more than 2.4 million electric customers and about 900,000 natural gas customers. This utility employs more than 8,500 people in both states. Approximately 3,200 of these employees are responsible for making sure the close to 10,200 electricity megawatts Ameren generates reaches its customers through its 7,500 miles of transmission wires. The remaining employees are in charge of other duties such as customer service.

While Ameren electricity and gas is available from both Ameren Illinois and Ameren Missouri, electric supply choice is only available in Illinois. Therefore, in Missouri, Ameren acts as both an energy distributor and a mandatory regulated supplier. Ameren Illinois customers have electric supply choice, so Ameren Illinois' primary responsibility is electric and gas delivery and infrastructure maintenance since consumers may purchase Illinois electric rates on supply from an alternative supplier.

A timeline of Ameren Illinois

In 1902, this utility got its start as Union Company of St. Louis, Missouri, and Central Illinois Public Service Company (CIPSCO). In 1904, Union Company lit up the 1904 St. Louis World Fair, making it the first utility to demonstrate a broad scale of electricity. In 1952, Union Company and CIPSCO came together to form the utility we now refer to as Ameren. Although, it wasn't until 1997 that this family of companies began to operate under the name Ameren. Since then, Ameren has acquired other utilities. Ameren Illinois Company is now comprised of the energy delivery companies formerly known as AmerenIP, AmerenCIPS and AmerenCILCO.

Ameren will continue to be your utility

Customers of Ameren Illinois may have electric supply choice but they cannot choose their distribution provider. In most cases, utilities own and operate the energy distribution system, making them responsible for delivery and maintenance. Therefore, if you are a customer of Ameren Illinois, it will continue to provide you with energy distribution services as well as infrastructure maintenance regardless of where you are purchasing your supply. It's important to note that Ameren electricity and gas supply is available as a default service. However, these Illinois electric rates on supply remain regulated and can change sporadically.

Updated: 7-21-15.