Constellation Logo Constellation Logo skip to main content
America&quote;s energy choice.
  • Contact Us
  • Log In
Search | Menu
Close
  • Why Constellation
    • Competitive Markets
    • Areas We Serve
    • Businesses We Serve
    • Manage My Account
  • Energy Solutions
    • For Your Home
      • Renew Your Service
        • How to Renew Your Home Energy Contract & Services with Constellation
      • Home Energy Options
        • Electricity
        • Natural Gas
          • Choice Gas
        • Renewable Energy
        • Solar
        • Bundle A/C Protection
        • Membership Plan
        • EV Home Charger Installation
      • Solutions by State
        • Connecticut Energy
          • Past Variable Rates
          • Energy-Saving Tips & Energy Assistance Programs for Connecticut Residents
        • Delaware Energy
        • Georgia Energy
          • Atlanta
          • Natural Gas Bill Assistance Resources in Georgia
        • Illinois Energy
          • Illinois Variable Rate History
        • Indiana Energy
        • Kentucky Energy
        • Maryland Energy
        • Massachusetts Energy
        • Michigan Energy
        • Nebraska Energy
        • New Jersey Energy
        • New York Energy
        • Ohio Energy
        • Pennsylvania Energy
          • PA - Past Variable Rates
          • PA - Past Variable Rates
        • Texas Energy
          • Dallas
          • Houston
          • StarTex Power
          • Manage Your Variable Rate
          • Arlington
          • Fort Worth
          • The Woodlands
          • Sugar Land
          • Irving
          • Pearland
          • Corpus Christi
          • Texas Winter Storm Information
          • Electricity Bill Assistance Resources in Texas
        • Washington, D.C. Energy
        • Wyoming Energy
        • Virginia Energy
        • Georgia Energy
          • Atlanta
        • Georgia Energy
          • Atlanta
      • Home Services
        • Home Services in Maryland
        • Home Services in Dallas & Houston, Texas
        • Home Services in Atlanta, GA: Protection Plans and Expert Repair Services
        • Constellation Connect
      • Payment Options
      • Refer a Friend (RAF)
        • Terms & Conditions
        • FAQs
      • FAQs
      • Find Available Plans
    • For Your Small Business
    • For Your Commercial Business
    • For Government
  • Energy 101
    • Energy Choice
    • Energy Education
    • Energy Innovation
    • Energy Safety Tips
    • Energy Saving Tips
    • Moving Tips and Tricks
    • Weather Preparedness
    • FAQs
    • Blogs
  • About Constellation
  • Contact Us
  • Log In
  • Chat
Business: 844-6-ENERGY Residential: 855-465-1244
BUSINESS
See What We Offer
RESIDENTIAL
How Can We Help You?
BUSINESS
See What We Offer
  • Home Page
  • Energy Solutions
  • For Your Home
  • Solutions by State
  • Illinois Energy
Print

Explore Electric & Natural Gas Rates in Illinois

Enter your zip code to search for electricity and natural gas plans in Illinois:

Illinois residents get a fixed supply rate

Illinois Natural Gas & Electricity Options

Illinois electricity plans from Constellation

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.

Compare Illinois Electricity Plans

Illinois renewable electricity plans from Constellation

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.

Compare Illinois Renewable Plans

Illinois natural gas plans from Constellation

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.

Compare Illinois Natural Gas Plans

 

What Illinois Customers Are Saying About Constellation

 

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:

1. Hassle-free switching with no service interruptions

You can compare natural gas prices and plans in Illinois and switch energy suppliers hassle-free and with no interruption to your service.

2. A quick and easy sign-up process

Our sign-up process is simple and straightforward, and can be completed in a matter of minutes.
 

3. Fixed-rate energy plans

Constellation is a trusted energy company with no hidden fees and a variety of electric, renewable and natural gas plans in Illinois to fit your life and budget.

4. Exceptional customer service

Our customer service team will help you with any questions you have when it comes to choosing a natural gas or electricity supplier with personal and timely responses.


When you join the Constellation family, you can:

Constellation Community Champions

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!

Learn how to apply

Shop for Energy-Efficient Products with Constellation

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!

Shop for products in our store

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.

Manage your home energy

Chicago Bulls, White Sox, and Blackhawks logos

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.


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

If you are experiencing a power outage, call your energy company in Illinois:

  • Ameren: 800-755-5000
  • ComEd: 800-334-7661

Sign up to receive power outage alerts from your utility company in Illinois:

  • Ameren
  • ComEd

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 any questions regarding participation in Illinois’ Net Metering program as a Constellation customer, please contact MMOPSIL@exeloncorp.com. Or, if you are ready to begin, please return the completed forms below:

  • Application Part 1
  • Application Part 2

  • IL Environmental Disclosure - Constellation NewEnergy, Inc
  • IL Historic Green Disclosure - Constellation NewEnergy, Inc.
  • Illinois Commerce Commission

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
Explore Energy Plans in Your Area

Zip Code is not valid


Constellation also serves residents in Texas, Georgia, Connecticut, Delaware, Indiana, Kentucky, Massachusetts, Maryland, Michigan, Nebraska, New Jersey, New York, Ohio, Pennsylvania, Virginia, Wyoming and Washington D.C.



+You may terminate this Contract without incurring an early termination fee during the 90 days following your enrollment date (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.  

Residential
  • Home Energy Options
  • Home Services
  • Payment Options
  • Rates & Plans
  • Refer a Friend
  • FAQs
  • Pay My Bill
  • Log Into My Constellation Account
Business
  • Request a Quote
  • Small & Medium Business
  • Commercial
  • Log In to Energy Manager
  • Log In to Channel Partner Portal
Corporate Information
  • About Constellation
  • Careers
  • Investors
  • Media Inquiries
  • Become a Partner
Get In Touch
Contact Us
Business: 844-6-ENERGY
GA Residential: 877-677-4355
TX Residential: 888-900-7052
Other Residential: 855-465-1244
Home Services: 844-823-HOME
Join the conversation:

Privacy Policy |  Terms and Conditions |  Blog Policy

© 2023 Constellation Energy Resources, LLC.  The offerings described herein are those of either Constellation NewEnergy, Inc., Constellation NewEnergy-Gas Division, LLC, Constellation Connect, LLC or Constellation Home Products & Services, LLC (d/b/a Constellation Home in Maryland and Pennsylvania and d/b/a Constellation in Georgia and Texas), each affiliates of each other. The prices of Constellation are not regulated by any state Public Utility Commission. You do not have to buy Constellation electricity, natural gas or any other products to receive the same quality regulated service from your local utility. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. Errors and omissions excepted.

Electricity or Gas Supplier License/Order #s: CA 1359, CTA0032; CT 06-07-11, 01-06; DE 00-162; DC GA06-2, EA01-5; GA GM-46; IL 16-0205, 17-0330; IA G-0010; ME 2000-989; MD IR-655, IR-311, IR-500, IR-228, 107-2276; MA GS-030, CS-015; MI U-14867, U-13660; NE NG-0043; NH DM 17-024; NJ GSL-0101, ESL-0016; OH 09-153G, 00-003E; PA A-125095, A-110036; OR ES4, RI 2379(Z1), D-96-6(E); TX 10014, B07305101; VA G-26, G-51, E-11A 

TX Licenses HVAC TACLA 00107498R, Electrical TECL 343159, Service Plan TSCP #684, Plumbing #43217, TREC #168