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Commonwealth Edison

Electric and natural gas utility in Illinois

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About Commonwealth Edison

Commonwealth Edison is a large-scale utility company in northern Illinois. It delivers electricity and natural gas services to more than 4 million residents and businesses. Originally founded in the 19th century as Western Edison Light Company, it is now a subsidiary of Chicago-based Exelon Corporation.

The company, known to most as ComEd, provides energy to customers in Illinois cities like Chicago, Naperville, and Rockford. To compare ComEd’s rates per kilowatt-hour (kWh) to other suppliers near you, enter your ZIP code on the Choose Energy marketplace.