Ameren Illinois

​Ameren Illinois is a regulated utility company headquartered in Collinsville, Illinois, providing electric and natural gas delivery services to over 1.2 million electric and 816,000 natural gas customers across central and southern Illinois. As a delivery-only utility, Ameren Illinois owns and maintains the infrastructure, such as wires, poles, and substations, that distributes energy to homes and businesses.

Beyond energy delivery, Ameren Illinois is committed to community engagement and sustainability. Through initiatives like the Ameren Illinois Energy Efficiency Program, the company collaborates with residents, businesses, and partners to reduce energy consumption, lower carbon emissions, and promote economic growth. Ameren Illinois also supports economic development by partnering with businesses to provide reliable energy solutions that foster business growth and thriving communities across Illinois.