Illinois Electricity Prices

Illinois sits mid-pack — 19.22¢ per kilowatt-hour in July 2026, 17th-highest of 51 and 0.2% below the national benchmark.

At Illinois's July 2026 average of 19.22¢/kWh, 10,500 kWh of annual use works out to $2,018 a year — around $168 a month. That lands within $4 a year of the same calculation run at the July 2026 national benchmark rate.

Over the full EIA series the Illinois jurisdiction average has risen 155% since January 2001, from 7.53¢ to 19.22¢ in July 2026 — a compound 3.7% per year. Illinois is among the most month-to-month variable third of jurisdictions.

May 2026, at 23.85¢ per kilowatt-hour. The July 2026 reading of 19.22¢ sits 19.4% below that peak. The lowest monthly average on record was 7.27¢ in January 2005.

May. Measured over the 25 complete calendar years the EIA series covers for Illinois, 2001 through 2025, May runs highest relative to its own year and January runs lowest — a swing of roughly 14.6 percentage points.

Among Illinois and its land-border neighbours in July 2026, Iowa posts the lowest average at 15.99¢ and Illinois the highest at 19.22¢. That makes Illinois the most expensive in the group, at 19.22¢.

Almost certainly not exactly, and this is the one caveat that governs every figure on this page. The published value is the EIA residential average across every utility and residential rate class in Illinois for July 2026 — a benchmark, never a billed amount. Even the jurisdiction figure is not one number — across the trailing year it moved between 16.36¢ in January 2026 and 23.85¢ in May 2026. Your own rate depends on your utility, tariff, usage tier, time-of-use schedule, and fixed monthly charges, none of which this index models. Read your bill for the rate that applies to you.