Contact Us

If you have questions or concerns regarding Illinois Energy®, please contact us by choosing the method that's best for you.

Illinois Energy Customer Service

PO Box 3066
Naperville, IL 60566-7066

1.877.292.9363

custcare@illenergy.com

Note: Please use the above contact information if you have questions about your Illinois Energy service. If you have billing questions, please contact your utility directly. The number is on your natural gas bill.

Large Commercial & Industrial

Michael Presto

michael.presto@southstarenergy.com

Sales Agency Opportunities

Erika Douglas

404.685.4105

erika.douglas@southstarenergy.com

Contact Us:

1.877.292.9363
8 a.m. to 6 p.m. CST, Monday - Friday

Company Info:

About Us
FAQs

Illinois Energy is not the same entity as your gas delivery company. You are not required to enroll with Illinois Energy. Beginning on 8/1/2026, the Nicor Gas' gas supply cost rate is $0.36 per therm. The utility gas supply cost will expire on 8/31/2026. Beginning on 8/1/2026, the North Shore Gas' gas supply cost rate is $0.4093 per therm. The utility gas supply cost will expire on 8/31/2026. Beginning on 8/1/2026, the Peoples Gas' gas supply cost rate is $0.3672 per therm. The utility gas supply cost will expire on 8/31/2026. For more information go to the Illinois Commerce Commission's free website at www.icc.illinois.gov/ags/consumereducation.aspx.

Enrollment eligibility is subject to Illinois Energy's credit and payment policies, and other eligibility requirements.