Explore Electric & Natural Gas Rates in Illinois
Enter your zip code to search for electricity and natural gas plans in Illinois:
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The Benefits of Choosing Constellation as your
Illinois Electric & Natural Gas Supplier
Compare natural gas rates, electricity plans, and energy solutions and choose the best option for your needs. As one of the leading energy suppliers in Illinois, all of our electricity, natural gas, and renewable energy plans include the following benefits:
Price Certainty
Fixed price per kWh for the length of your plan.
No Price Swings
No sudden changes to your electricity supply rate helps protect against seasonal and market volatility.
Easy to Switch
No service interruption. We coordinate the switch with ComEd for you.
Illinois Natural Gas & Electricity Options
Your supply price stays the same for the length of your plan—while keeping the same utility delivery and billing you rely on so there are no unexpected monthly changes.
Fixed-Rate 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 Energy 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.
Additional Benefits of Being a Constellation Customer
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Promoting Sustainability Through Sports in Illinois
As the preferred energy choice of the Chicago Blackhawks and Chicago Bulls, Constellation has been the official clean 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 for the Blackhawks and the Northwestern University Wildcats.
Constellation is proud to power the United Center and the Chicago Bulls and Chicago Blackhawks practice facilities.
Switching Energy Suppliers in Illinois
In Illinois, utility companies used to be the only option for energy users — the utility controlled delivery, pricing and maintenance. Today, you can choose the best Illinois energy supplier for you meaning it's easy to compare electricity, natural gas, and renewable electric plans near you and select the best rate and plan for your needs.
What does Illinois energy choice mean?
Retail energy companies in Illinois compete for your business, which can result in reduced energy costs, better customer service, more innovative energy solutions, and energy plans to fit your budget. For example, Constellation offers:
- no sign-up fees
- exceptional customer service
- a variety of fixed-rate electric and natural gas plans
Learn more about energy choice.
Understanding Energy Suppliers in Illinois vs. Utility Companies
Utilities companies deliver natural gas to your home. In Illinois, this means your utility — which many customers refer to as light and power companies — owns the power lines and gas pipelines which deliver energy to you to serve your home.
Constellation is an Illinois energy supplier, which means that we aren't the utility company that delivers natural gas to your home, but the one who sets your rate and contract term. As your energy supplier in Illinois, we provide you with customized electric plans, competitive Illinois natural gas rates, and exceptional customer service!
Learn more about the differences between energy suppliers and utility companies.
Information for Constellation Customers & Illinois Residents
To pay your energy bill online, select your local Illinois energy company below:
- Ameren: Pay your bill
- ComEd: Pay your bill
- Nicor Gas: Pay your bill
- North Shore Gas: Pay your bill
- People's Gas: Pay your bill
If you smell gas, get out of the area, and call your local Illinois utility company immediately.
- Nicor Gas: 888-642-6748
- North Shore Gas: 866-556-6005
- People's Gas: 866-556-6002
- Before you dig: 811
If you have already set up net metering with your local utility, we will receive notification from your utility when they send us their regular transactions, and we will adjust our billing procedures accordingly.
- IL Environmental Disclosure - Constellation NewEnergy, Inc
- IL Historic Green Disclosure - Constellation NewEnergy, Inc.
- Illinois Commerce Commission
For Illinois renewable product offers, at the time of offering on this website, Constellation has not committed to a particular location or locations for the Renewable Energy Certificates used to fulfill its REC obligations under the terms of the product offer. Subject to change, Constellation does not anticipate pairing any of a customer’s energy usage with RECs from renewable energy resources located within the State of Illinois.
Switching to Constellation is as Easy as 1-2-3
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Small Business Customer? Call us at 1-855-585-3935
Constellation also serves residents in Texas, Georgia, Connecticut, Delaware, Indiana, Kentucky, Massachusetts, Michigan, Nebraska, New Jersey, Ohio, Pennsylvania, Virginia, Wyoming and Washington D.C.
+90-Day Guarantee Period. You may terminate your Contract without incurring an early termination fee within the 90 days after entering into (the “Guarantee Period”) by notifying us in writing or by calling our customer care center at 1-855-465-1244. Upon your termination during the Guarantee Period, we will return you to being supplied by the Utility at your next available meter read date and you will remain responsible for payment for electricity and related costs and charges incurred under this Contract through such meter read date. Not applicable in Texas. Not applicable in Connecticut or Illinois where residential customers are never charged an early termination fee.