Commercial electricity in Joliet, Illinois

Electric utilities serving Joliet

These are the utilities EIA records in Will County and Kendall County, the 2 counties it spans. EIA lists a utility in a county when it has customers anywhere in it, so this is everyone with a presence, ordered by commercial customers across Illinois, not a statement about any one address. Prices are EIA’s averages over all of each utility’s commercial customers: revenue divided by kWh.

Find the list for a single ZIP Code with the utility lookup, or set utilities side by side with the comparison tool.

What businesses in Joliet pay

Across Illinois, businesses paid an average 13.81¢ per kWh over the 12 months to August 2026, level with the U.S. average of 13.87¢, and up 9.1% on the 12 months before. That ranks Illinois 16 of 51, where 1 is the highest price. In 2025 the average commercial account in the state used 5,997 kWh a month, about $786 a month at the state price; that is a mean pulled up by a few very large users, so most small businesses use less.

A city has no price of its own: two businesses on the same street can pay very different amounts per kWh, because the rate schedule, the size of the peak and, where it is allowed, the supply contract matter more than the location. The Illinois page has the state’s price history since 2010 and every utility with at least 500 commercial customers.

Choosing a supplier in Joliet

Eligible Illinois commercial accounts in ComEd and Ameren Illinois territory may purchase supply from a licensed retail supplier while delivery stays regulated. Municipal utility territories are separate and are not part of that market.

Where prices are heading

EIA does not forecast single states. For the East North Central census division, which includes Illinois, its November 2026 Short-Term Energy Outlook puts the average commercial price at 14.03¢ per kWh for 2026 and 14.36¢ for 2027, up 10.5% from 12.99¢ in 2025. The forecast for every region.

About Joliet

The Census Bureau estimates Joliet had 152,241 residents on July 1, 2025, up 1.2% from 150,368 in 2020. It spans 2 counties, most of its people in Will County.

Other cities in Illinois

• Chicago
• Aurora
• Naperville
• Rockford
• Elgin
• Springfield
• Peoria

Common questions

Who provides electricity to businesses in Joliet?

EIA lists ComEd, Ameren Illinois, City of Naperville and Corn Belt Energy Corporation as electric utilities in Will County and Kendall County. Which one serves a given address depends on the street; the utility on an existing bill is the definitive answer, and a utility can confirm service for a new site.

What is the average commercial electricity rate in Joliet?

There is no official figure for a city. EIA publishes prices by state and by utility: ComEd averaged 15.13¢ per kWh for its commercial customers in 2025, and Illinois averaged 13.81¢ over the 12 months to August 2026. A business’s own price depends on its rate schedule, its demand and, where it can choose, its supply contract.

Can a business in Joliet choose its electricity supplier?

Eligible Illinois commercial accounts in ComEd and Ameren Illinois territory may purchase supply from a licensed retail supplier while delivery stays regulated. Municipal utility territories are separate and are not part of that market. The state page for Illinois explains how it works and who regulates it.