Ameren

Electric, gas and water utilities.

ACredibility A · last verified 2026-10-12 · 100% official or government sources

What does this mean?

Grade A (high: almost everything comes from official pages read directly). 100% of 23 sources are the organization's own pages or government sites.

Website Open in the interactive directory JSON

Get help with (3)

Billing errorDispute with Ameren by phone and in writing, then with the state commission.
Disconnection noticeSet up a deferred payment agreement (smaller down payment in winter), apply for assistance, and have a medical provider request a Medical Hardship Extension.
Outage creditReport outages online or in the app; register medical equipment for planned-outage notices.

Contacts (8)

Phone

Ameren Illinois residential customer service
+1-800-755-5000
Hours: Monday to Friday, 7 a.m. to 7 p.m.
Use for: Billing error, Bill went up, Disconnection notice, Deposit not returned, Outage credit, Poor service or broken promise
Source: ameren.com, verified 2026-10-12
Ameren Missouri residential customer service (also to request medical registry and Caring Contact forms)
+1-800-552-7583
Hours: Monday to Friday, 7 a.m. to 7 p.m.
Use for: Billing error, Bill went up, Disconnection notice, Deposit not returned, Outage credit, Poor service or broken promise
Source: ameren.com, verified 2026-10-12

Online forms

Report an outage (Outage Center)
ameren.com/outages
The outage page lists no phone number; it points to the Report Outage link and the Ameren app.
Use for: Outage credit
Source: ameren.com, verified 2026-10-12

Online tools and accounts

Deferred payment agreements (sign in to set up) Sign-in required
ameren.com/bill/assistance/agreements
Use for: Disconnection notice
Source: ameren.com, verified 2026-10-12
Energy assistance programs (LIHEAP, Keeping Current, Dollar More, discounts)
ameren.com/bill/assistance
Use for: Disconnection notice
Source: ameren.com, verified 2026-10-12
Health support (Medical Hardship Extension, Medical Equipment Registry, Caring Contact)
ameren.com/bill/assistance/health
Use for: Disconnection notice, Outage credit
Source: ameren.com, verified 2026-10-12

Mail

Ameren Illinois correspondence
Ameren Illinois, PO Box 88034, Chicago, IL 60680-1034
Use for: Billing error, Deposit not returned, Poor service or broken promise
Source: ameren.com, verified 2026-10-12
Ameren Missouri correspondence
Ameren Missouri, PO Box 790098, St. Louis, MO 63179-0098
Use for: Billing error, Deposit not returned, Poor service or broken promise
Source: ameren.com, verified 2026-10-12

Escalation path

Go up one step at a time. Keep the reference numbers and dates from each contact.

Customer service
PhoneAmeren Missouri residential customer service (also to request medical registry and Caring Contact forms) +1-800-552-7583
Illinois: illinois-phone.
Supervisor
Written complaint
MailAmeren Missouri correspondence Ameren Missouri, PO Box 790098, St. Louis, MO 63179-0098
Illinois: illinois-mail. Ameren publishes no separate complaint channel.
State agency
Your state’s utility commission. Find it in the list of state agencies (also as JSON: states/<code>.json, for example states/ny.json).
Missouri Public Service Commission; Illinois Commerce Commission.
State agency
Your state’s attorney general. Find it in the list of state agencies (also as JSON: states/<code>.json, for example states/ny.json).

Known blockers

Deferred payment agreements are set up after sign-in; business accounts must call the Credit Department.
Ameren lists no outage phone number on its outage page.

Scam warnings

Official domains

ameren.com
amerenillinois.com

Real links and emails from Ameren end in one of these.

Ameren will never ask you for

Ameren Illinois says it will never request payment by Green Dot card, MoneyPak or other prepaid credit card.
Source: ameren.com, verified 2026-10-12
Ameren Illinois says it will never threaten to disconnect service unless payment is made immediately.
Source: ameren.com, verified 2026-10-12

Known scams

Callers threaten to disconnect service unless payment is received immediately, and often say a service person is on the way to shut off the power.
Source: ameren.com, verified 2026-10-12
Scammers demand immediate payment and suggest Bitcoin, prepaid money cards or cash apps.
Source: ameren.com, verified 2026-10-12
Scammers offer to wipe out the total amount due in exchange for an immediate partial or specially discounted payment.
Source: ameren.com, verified 2026-10-12
Search engine postings copy Ameren's contact information but link to scammers' phone numbers and websites.
Source: ameren.com, verified 2026-10-12
Callers claim the customer overpaid and ask for bank or card details. Ameren says it credits the account or mails a refund check instead.
Source: ameren.com, verified 2026-10-12

Report phishing

Report a suspected scam call (Ameren Missouri)
+1-800-552-7583
Source: ameren.com, verified 2026-10-12
Report a suspected scam call (Ameren Illinois)
+1-800-755-5000
Source: ameren.com, verified 2026-10-12

For the whole industry, read Electric and gas utilities — how complaints work.

Verification notes

Electric and gas utility with two operating companies: Ameren Missouri and Ameren Illinois. Programs differ by state; the website shows Missouri or Illinois content based on a location selector. Regulators: Missouri Public Service Commission; Illinois Commerce Commission.

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