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CUSTOMER CARE

Online Contact Form
Phone  866.694.1262
Fax  866.257.1795
Hours  7am - 7pm (CST) Monday-Friday

Online Contact Form
Phone  888.451.3911
Fax  888.354.9837
Hours 7:30am - 4:30pm (CST) M-F

Ameren Illinois 1.800.755.5000

Corporate Offices

Illinois Regional Office
1500 Eastport Plaza Drive
Collinsville, IL 62234

Ohio Regional Office
312 Walnut Street, Suite 1500
Cincinnati, Ohio  45202

Corporate Headquarters
6555 Sierra Drive
Irving, Texas  75039
214-812-4600