Phone: 800.755.5000
Hours: M-F 7:00 a.m. - 7:00 p.m
Phone: 800.232.2477
Fax: 877.263.7369
Hours: M-F 7:00 a.m. - 5:30 p.m.
To make a payment by phone, call Ameren Illinois' authorized payment vendor SpeedPay at 888.777.3108
Please note: Ameren's Call Center Agents are not authorized to take payments.
Correspondence Mailing Address
Ameren Illinois
300 Liberty
Peoria, IL 61602
Payment Mailing Address
Ameren Illinois
PO Box 88034
Chicago, IL 60680-1034
Web Support
Phone: 877.263.7361
Fax: 800.851.1791
Hours: 7:00 a.m. - 7:00 p.m. M-F