Commonwealth Edison (ComEd)
ComEd is Illinois's largest utility, an Exelon subsidiary serving approximately 4 million customers across the Chicago metro area and northern Illinois.
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About Commonwealth Edison (ComEd)
Commonwealth Edison, known as ComEd, is Illinois's largest utility and an Exelon subsidiary, serving approximately 4 million customers across the Chicago metro area and northern Illinois, including Joliet, Naperville, and Rockford. ComEd operates within the PJM Interconnection regional grid. Like other Illinois utilities, ComEd does not sell electricity supply directly — it delivers power through its poles, wires, and meters, while customers choose their electricity supplier from over 100 certified Alternative Retail Electric Suppliers (ARES), or default to ComEd's own supply rate known as the Price to Compare. ComEd territory has the most active supplier competition in the state due to its large customer base.
How to Switch
ComEd territory residents can compare Alternative Retail Electric Supplier plans on 97 Options and switch without any interruption to delivery — ComEd continues managing the physical grid throughout the transition.
Frequently Asked Questions
Does ComEd sell electricity plans directly?
ComEd delivers electricity through its infrastructure. Customers choose a supplier from over 100 certified Alternative Retail Electric Suppliers, or default to ComEd's own Price to Compare rate.
What happens if I don't choose a supplier in ComEd territory?
If you don't select an Alternative Retail Electric Supplier, you're automatically enrolled in ComEd's default supply service at the regulated Price to Compare rate.