Gas prices in Decatur, IL
Gas prices in Decatur, ILDaily metro average from AAA (2026-10-26), per gallon including taxes, for AAA’s Decatur metro area in Illinois.
Regular
$4.74
per gallon · €1.12/L
Midgrade
$5.34
per gallon · €1.26/L
Premium
$5.83
per gallon · €1.38/L
Diesel
$6.59
per gallon · €1.55/L
up vs last week 6.6% vs last week ($4.45) up vs a year ago 55.8% vs a year ago ($3.04)
Nearest Illinois metros on price
The metros immediately either side of Decatur in Illinois, so you can see whether paying $4.74 here is normal or not.
| Metro | Regular | vs Decatur |
|---|---|---|
| East Saint Louis, IL | $4.53 | −$0.21 |
| Champaign & Urbana, IL | $4.66 | −$0.08 |
| Moline & Rock Island, IL | $4.70 | −$0.04 |
| Bloomington & Normal, IL | $4.72 | −$0.02 |
| Decatur, IL | $4.74 | — |
| Carbondale & Marion, IL | $4.74 | +$0.00 |
| Springfield, IL | $4.77 | +$0.03 |
| Peoria & Pekin, IL | $4.78 | +$0.04 |
| Danville, IL | $4.78 | +$0.04 |
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Tools for drivers in Decatur
Frequently asked questions
How much is gas in Decatur right now?
Regular gasoline averages $4.74 per gallon across Decatur, IL today (AAA metro average, 2026-10-26). Midgrade is $5.34, premium $5.83 and diesel $6.59.
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 5th cheapest of 17 Illinois metros AAA tracks.
Are gas prices in Decatur higher than a year ago?
Yes — regular is 55.8% higher than this time last year ($3.04/gal then, $4.74 now).