Adams Electric Coop.
Clay Electric Coop.
Clinton County Electric Coop.
Coles-Moultrie Coop.
Corn Belt Energy Corp.
Eastern Illini Electric Coop.
Egyptian Electric Coop., Assn.
EnerStar Power Corp.
Farmers Mutual Electric Coop.
Illinois Rural Electric Coop.
Jo-Carroll Energy Coop.
McDonough Power Coop.
M.J.M. Electric Coop.
Menard Electric Coop.
Monroe County Electric Coop. 
Norris Electric Coop. 
Rock Energy Cooperative
Rural Electric Convenience Coop. 
Shelby Electric Coop. 
South Eastern Illinois Electric Coop.
Southern Illinois Electric Coop. 
Spoon River Electric Coop. 
Tri-County Electric Coop. 
Wayne-White Electric Coop.
Western Illinois Electrical Coop.