Electricity in Illinois averaged 19.32¢ per kWh in August 2026 and 19.23¢ for Jan–Aug 2026 — the 18th most expensive state, 6% above the U.S. average of 18.16¢.
| Use | Illinois | U.S. average |
|---|---|---|
| 500 kWh | $96.15 | $90.95 |
| 1,000 kWh | $192.30 | $181.90 |
| 1,500 kWh | $288.45 | $272.85 |
| 722 kWh (yours) | $138.84 | $131.33 |
| Fuel | Price | Basis |
|---|---|---|
| Electricity | 19.23¢/kWh | Jan–Aug 2026 |
| Natural gas | $1.09/therm | 2025 average |
| Propane | $1.94/gal | Oct 19, 2026, pre-tax |
| Monthly use | August 2026 | Jan–Aug 2026 | U.S. average |
|---|---|---|---|
| 500 kWh | $96.60 | $96.15 | $90.95 |
| 1,000 kWh | $193.20 | $192.30 | $181.90 |
| 1,500 kWh | $289.80 | $288.45 | $272.85 |
| 722 kWh (state average) | $139.49 | $138.84 | $131.33 |
These are EIA's average residential prices: total revenue from residential customers divided by kWh sold. Delivery charges, fixed monthly customer charges, fuel adjustments and utility-paid taxes are all spread over every kWh, so the figure is close to an all-in rate (bill ÷ kWh). Your own utility, plan and usage tier can put you above or below it.
August 2026 figures are preliminary and EIA revises them; we refresh this page automatically when EIA publishes a new month (last update 2026-10-23).
The full method, material data and tips are on the main electricity rates by state page.