Gas prices in Decatur, IL
Gas prices in Decatur, ILDaily metro average from AAA (2026-09-11), per gallon including taxes, for the Decatur area of Illinois.
Regular
$4.52
per gallon · €1.03/L
Midgrade
$5.05
per gallon · €1.15/L
Premium
$5.62
per gallon · €1.28/L
Diesel
$5.96
per gallon · €1.36/L
up vs last week 13.5% vs last week ($3.99) up vs a year ago 38.0% vs a year ago ($3.28)
Nearest Illinois metros on price
The metros immediately either side of Decatur in Illinois, so you can see whether paying $4.52 here is normal or not.
| Metro | Regular | vs Decatur |
|---|---|---|
| Bloomington-Normal | $4.49 | −$0.03 |
| Carbondale-Marion | $4.50 | −$0.02 |
| Champaign-Urbana | $4.50 | −$0.02 |
| Danville | $4.51 | −$0.02 |
| Decatur | $4.52 | — |
| Peoria-Pekin | $4.53 | +$0.00 |
| Chicago Metro | $4.54 | +$0.02 |
| Kankakee-Bradley | $4.56 | +$0.04 |
| Alexander County | $4.70 | +$0.17 |
All Illinois gas prices →
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Frequently asked questions
How much is gas in Decatur right now?
Regular gasoline averages $4.52 per gallon across Decatur today (AAA metro average, 2026-09-11). Midgrade is $5.05, premium $5.62 and diesel $5.96.
Is gas cheaper in Decatur than the rest of Illinois?
A Illinois state comparison is unavailable today.
Where does Decatur rank in Illinois?
Decatur is the 12th cheapest of 17 Illinois metros AAA tracks.
Are gas prices in Decatur higher than a year ago?
Yes — regular is 38.0% higher than this time last year ($3.28/gal then, $4.52 now).