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Providing power to Northern Illinois

Exelon has a strong relationship with the state of Illinois. With headquarters for Exelon Corporate, Exelon Nuclear Midwest and ComEd, as well as Constellation sales offices in the state, we provide jobs, promote charitable causes and foster valuable economic development in our communities.

Economic Development

Exelon Corporate headquarters, ComEdExelon Nuclear Midwest regional headquarters, six nuclear plants, one wind project, one solar plant, and one peaker plant are all located in the northern and central regions of the state. In total, Exelon and its family of companies contribute about 12,900 jobs to the local economy and more than $1 billion in property tax payments as of 2012.

Our delivery company, ComEd, provides reliable electricity to 3.8 million customers. Exelon Nuclear owns and operates six nuclear plants, and Exelon Power operates one wind project, one solar plant, and one peaker plant in the state. Constellation provides customer choice through retail energy sales to residential, commercial and industrial customers in Illinois.

Constellation provides commercial, industrial, public sector and government agencies, municipalities and utilities with a comprehensive array of products and services to meet electricity, natural gas, and sustainability needs. Constellation also provides competitive pricing for electricity and natural gas, as well as renewable energy options for residential customers.

Environmental Commitment

In 2010, Exelon constructed Exelon City Solar, a 10-megawatt solar installation, located on a 41-acre brownfield in Chicago’s West Pullman neighborhood. The $60 million project captures the sun’s rays and converts them into 14,000 megawatt-hours of clean electricity per year. 

Constellation also works with its customers to reduce energy consumption and offers renewable and sustainable options including:

  • Solar
  • Energy Efficiency
  • Renewable Energy certificates
  • Load response solutions

Clean & Reliable Nuclear Energy

Illinois' 11 reactors generate about 48 percent of the state's electricity and play an important role in maintaining a balanced electric portfolio in the state. They provide 11,541 megawatts of around-the-clock electricity for Illinois homes and businesses.

These plants also provide about 90 percent of Illinois' carbon-free electricity. Without the carbon-free electricity produced by these nuclear plants, an additional 80 million metric tons of carbon dioxide would be released annually. That's the equivalent of the emissions from more than 15 million cars each year.

Exelon employs about 5,900 people at its nuclear energy facilities and Midwest nuclear headquarters in Illinois (Braidwood, Byron, Clinton, Dresden, LaSalle, Quad Cities and Cantera). These facilities are estimated to contribute about $290 million in state and local taxes, and nearly $1.1 billion in federal taxes each year.

Community Involvement

At Exelon, our employees get involved where they work and live. Our Illinois employees recorded more than 34,000 volunteer hours and Exelon and its operating companies donated over $14.6 million in grants to charitable causes in 2012. Furthermore, our senior management team and other employees serve on numerous charitable boards throughout the Chicago area.

We believe that one of the best ways to benefit our communities is by supporting education. The Stay in School Initiative is Exelon's partnership with the United Way focused on spurring graduation rates and stemming truancy in  three Chicago communities with some of the highest dropout rates in the city.  Students who participated in the Stay in School Initiative last year had a 93% graduation rate, well above the 55% average in Chicago Public Schools.

Corporate Offices

Exelon Corporate

10 S Dearborn St. 48th floor
Chicago, IL 60603-2398

Exelon Nuclear

4300 Winfield Rd, 5th Floor
Warrenville, IL 60555


Two Lincoln Center
Oakbrook Terrace, IL 60181-4260

440 S. LaSalle Street
Chicago, IL 60605-1028

Visit ComEd’s Website


Sales Office

100 N Lincolnway, Suite B

North Aurora, IL 60542

Sales Office

550 W. Washington Boulevard, Suite 300

Chicago, IL 60661

Power Plants

Braidwood Generating Station

Braidwood Generating Station

Braidwood Generating Station, Exelon's newest nuclear power station, is located in northeastern Illinois, about 60 miles southwest of Chicago in Will County. The 2-unit station is built on a 4,457-acre site and its cooling lake was formed from scarred farming land and an old strip mine.

35100 South Route 53
Braceville, Illinois 60407-9619
Byron Generating Station

Byron Generating Station

Byron Generating Station is located near Byron in northern Illinois, about 110 miles west of Chicago. It’s a 2-unit nuclear power facility that can produce enough electricity to power more than 2 million average American homes.

4450 North German Church Road
Byron, Illinois 61010-9794
Clinton Power Station

Clinton Power Station

Clinton Power Station, one of Exelon's newest nuclear power plants, is located in central Illinois. The unit can produce enough energy to power about 1 million average American homes.

8401 Power Road
Clinton, Illinois 61727
Dresden Generating Station

Dresden Generating Station

Dresden Generating Station, located in rural Grundy County in northern Illinois, is home to the nation’s first full-scale, privately financed nuclear power plant, which began operation in 1960. The 2-unit facility can produce enough energy to power more than 1.5 million average American homes.

6500 North Dresden Road
Morris, Illinois 60450-9765


10 S. Dearborn Street, 48th Floor
Chicago, Illinois 60603
800.483.3220  |   directions
Exelon City Solar

Exelon City Solar

This 10 MW solar photovoltaic facility, completed in 2010, was built on a “brownfield” site in an industrial corridor on the south side of Chicago.

1201 W. 120th Street
Chicago, Illinois 60643
LaSalle County Generating Station

LaSalle County Generating Station

LaSalle County Generating Station is located in rural LaSalle County in northern Illinois, about 75 miles southwest of Chicago. The station is built on a 3,055-acre site with a 2,058-acre man-made cooling lake, which is also a popular fishery managed by the Illinois Department of Natural Resources.

2601 North 21st Road
Marseilles, Illinois 61341-9757
Quad Cities Generating Station

Quad Cities Generating Station

Quad Cities Generating Station is a dual-unit boiling water reactor nuclear power plant located in Cordova, Illinois. Built on 765-acre site along the Mississippi River, this combined production is enough electricity to power more than 1.5 million average American homes.

22710 206th Avenue North
Cordova, Illinois 61242-9740
Southeast Chicago Energy Project

Southeast Chicago Energy Project

Southeast Chicago Energy Project Generating Station is operated by Exelon Power, a business unit of Exelon Generation.  It is an 8-unit natural gas power plant located in Chicago, Illinois.

3141 E 96th Street
Chicago, Illinois 60617
Zion Station

Zion Station

Zion Station is a former nuclear generating facility that has been converted into an electrical grid voltage-stabilizing facility. It is located on the western shore of Lake Michigan in the Northeast Illinois community of Zion. After more than 20 years of operation, Zion's two reactors were permanently shut down on January 15, 1998.

101 Shiloh Blvd.
Zion, Illinois 60099