Illinois Natural Gas & Electricity Options
Electricity Plans
Protect your budget with fixed-rate electricity plans. Choose the best electricity plan for your home based on our current Illinois alternative retail electric supplier rates and terms.
Renewable Electric Plans
Support sustainable energy efforts while locking in a fixed-rate electricity plan. Enter your zip code to find Illinois electric plans that are sourced by 100% national wind power for your home.
Natural Gas Plans
Lock in your fixed-rate energy plan based on current alternative Illinois natural gas supplier rates. Enter your zip code in IL to find which Constellation natural gas plans are available for your home and compare natural gas rates for Illinois.
I am so pleased with Constellation, that I have been flatly telling other [energy] companies to stop calling me.
Residential Customer
Really saved me money. It's great knowing that ComEd and Constellation are both owned by the same company named Exelon. Obviously this makes them the most trusted choice for my electric supply! Thank you Constellation!
Residential Customer
Great company, I have saved a lot of money on my utility bills; you won't see the big difference every month but I did the math throughout the year and it was a very significant amount. Very impressed!
Residential Customer
When you join the Constellation family, you can:
Support Great Causes
Constellation customers can nominate local causes they care about to receive small grants (up to $500) through our Community Champions program. In Illinois, Constellation has donated over $15,750 to local groups!
Shop to Save Money & Energy
When you choose energy-efficient products, you can lower your energy consumption, conserve water, and you may even see financial savings. Find energy-efficient products in our store and get free shipping on all orders!
Have the Power to Connect All Your Devices
Constellation Connect, our smart home security system, brings your home together so you can control all your smart devices, like your thermostat, lights, or voice-controlled speakers, from the Constellation Connect app with $0 activation fees and no contracts so you can start managing your energy.
Promoting Sustainability Through Sports in Illinois
As the preferred energy choice of the Chicago Blackhawks and Chicago Bulls, Constellation has been the official energy provider of the Chicago United Center since 2011. We believe in helping home-team fans save energy each season by hosting Go Green Games, and supporting Illinois energy users by donating Green-e Energy Certified Renewable Energy Certificates (RECs) each and every Go Green Game.
Constellation is proud to power the United Center and the Chicago Bulls and Chicago Blackhawks practice facilities.