Cheapest Gas in Illinois
Every Illinois metro AAA tracks, ranked from the lowest regular price up, updated 7/21/26. The cheapest gas in Illinois right now is $4.06/gal in Lake County.
Cheapest metroLake County$4.06/gal regular
| # | Metro | Regular | Diesel |
|---|---|---|---|
| 1 | Lake County | $4.06 | $5.02 |
| 2 | Quincy | $4.07 | $4.82 |
| 3 | Kankakee-Bradley | $4.08 | $4.98 |
| 4 | Rockford | $4.09 | $4.96 |
| 5 | Decatur | $4.10 | $4.92 |
| 6 | Danville | $4.10 | $4.98 |
| 7 | Champaign-Urbana | $4.10 | $4.85 |
| 8 | Springfield | $4.11 | $4.84 |
| 9 | Bloomington-Normal | $4.11 | $4.88 |
| 10 | Elgin | $4.12 | $4.96 |
| 11 | Davenport-Moline-Rock Island (IL only) | $4.13 | $5.11 |
| 12 | Peoria-Pekin | $4.16 | $5.02 |
| 13 | East Saint Louis | $4.16 | $5.02 |
| 14 | Carbondale-Marion | $4.18 | $5.11 |
| 15 | Chicago Metro | $4.25 | $5.15 |
| 16 | Alexander County | $4.40 | $0.00 |
| 17 | City of Chicago | $4.56 | $5.72 |