Ameren Electricity Rates

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Ameren Service Area

Ameren is a utility company that was founded in 1997 from the merger of two mid-west utility companies: Union Electric Company and Central Illinois Public Service Company. Ameren headquarters is now in St. Louis where they serve as a holding company for 4 separate companies.

  • Ameren Missouri
  • Ameren Illinois
  • Ameren Transmission Company
  • Ameren Services

Together Ameren's subsidiaries serve 2.4 million electric and 900,000 natural gas customers across Missouri and Illinois.

Ameren Contact Information & Phone Number

Ameren Contact Information

Customer Service: Call (800) 313-6862 

Hours: Mon. – Fri. 8 a.m. – 6 p.m.

For Outages or Downed Power Lines: 

  • Call (800) 755-5000
  • Hours: 24/7

Online Chat

Chat with a live agent on the Ameren website.

Hours: Mon. – Fri. 7 a.m. – 7 p.m. (Saturday and Sunday: Closed)

Ameren Mailing Address

Ameren Illinois
PO Box 88034
Chicago, IL 60680-1034

Ameren Illinois
300 Liberty
Peoria, IL 61602

About Ameren 

Headquarters: St. Louis, Missouri

Founded: 1997

Mission: Empowering our customers' modern lives through safe, reliable and efficient delivery of electricity.

Service Offerings: Ameren offers natural gas, electric and renewable options to residential, commercial, and industrial customers.

Market Served: Missouri and Illinois

How Ameren Works with Suppliers

Since Illinois is a deregulated energy market, customers in this state can choose their own retail electricity supplier but are still connected to their utility provider. Every customer within the Ameren service area receives their electricity supply through the utility regardless of which retail electric supplier they select. Ameren works with more than 50 electricity suppliers to deliver electricity to homes and businesses across Illinois, including Green Mountain Energy and Direct Energy. 

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