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.
Together Ameren's subsidiaries serve 2.4 million electric and 900,000 natural gas customers across Missouri and Illinois with their mission of "Empowering our customers' modern lives through safe, reliable and efficient delivery of electricity."
Ameren serves a number of regions within Missouri and Illinois, excluding the Chicago area.
Business Phone: 800-232-2477
Residential Phone: 800-755-5000
Website: https://www.ameren.com/
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.
