IL · ranked #18 in the US
Illinois residential rate: 16.9¢/kWh
That's 2% higher than the US average of 16.5¢/kWh. Competitive retail market layered on top of ComEd (Chicago) and Ameren (downstate) wires companies; nuclear-heavy generation mix.
Estimated cost
$57.04/month
$1.90 per day$693.96 per year337.5 kWh monthly
W
A space heater draws full power only while the thermostat/compressor is running — about 7.5 effective hours at 1500W across your 10-hour window.
At your rate
What appliances cost in Illinois.
Typical monthly running cost at 16.9¢/kWh, sorted by biggest impact on your bill.
Utilities serving Illinois
- ComEd (Exelon)
- Ameren Illinois
Deregulation status
full
In Illinois you can shop for an electricity provider separately from the utility that delivers power. Switching suppliers is often the single biggest lever on your monthly bill.
Sources: www.eia.gov · www.icc.illinois.gov
Last updated: 2026-04-13