Gas prices in Illinois today
The latest reported regular gas average in Illinois is $4.89 per gallon, with diesel at $6.70/gal. Prices include taxes. Compare fuel grades, recent changes and local metro averages below; individual pump prices vary.
Illinois gas price trends
Regular, AAA daily state averages, as of 2026-10-25
A 15-US-gallon fill of regular gasoline in Illinois costs about $73.41 at the state average reported on 2026-10-25, $3.28 more than on 2026-10-18.
The comparison holds the amount of fuel constant, so it shows what the price change means for your bill. For a road trip, use the averages to set a budget and check actual pump prices before choosing a stop.
- vs yesterday
- down Illinois regular 0.1%
- $4.90 on 2026-10-24 → $4.89
- $0.08 less per 15-gallon fill
- vs a week ago
- up Illinois regular 4.7%
- $4.68 on 2026-10-18 → $4.89
- $3.28 more per 15-gallon fill
- vs a month ago
- up Illinois regular 1.4%
- $4.83 → $4.89
- $0.99 more per 15-gallon fill
- vs a year ago
- up Illinois regular 50.7%
- $3.25 → $4.89
- $24.69 more per 15-gallon fill
Cost for 15 US gallons of regular gasoline · USD
- Reported 2026-10-25
- USD 73.41
- Week ago (2026-10-18)
- USD 70.13
- Month ago
- USD 72.42
- Year ago
- USD 48.72
FuelWide calculation: each AAA regular state average × the selected US gallons, rounded to cents. Observations as of 2026-10-25; month-ago and year-ago are AAA's comparison labels. Station prices vary.
Check the AAA source for Illinois
| Period | regular | midgrade | premium | diesel |
|---|---|---|---|---|
| Reported 2026-10-25 | $4.89 | $5.50 | $6.04 | $6.70 |
| Yesterday (2026-10-24) | $4.90 | $5.49 | $6.04 | $6.68 |
| Week ago (2026-10-18) | $4.68 | $5.31 | $5.85 | $6.56 |
| Month ago | $4.83 | $5.43 | $5.98 | $6.82 |
| Year ago | $3.25 | $3.86 | $4.32 | $3.74 |
The EIA doesn’t survey Illinois weekly, so there is no long Illinois series. For the trend it follows, see US gas price history since 1990 →
Illinois diesel prices
Diesel averages $6.70 per gallon in Illinois, according to AAA on 2026-10-25. That is $0.36/gal above the unweighted mean of AAA’s 51 diesel averages for states and DC. A 30-gallon fill costs about $201.00.
Illinois diesel prices by city, with the weekly and yearly change and the diesel tax →
Lowest reported metro diesel averages in Illinois
- Alexander County$0.00/gal
- Danville$6.58/gal
- Champaign-Urbana$6.59/gal
- Decatur$6.59/gal
- East Saint Louis$6.61/gal
AAA metro averages as of 2026-10-25. Area averages, not individual station prices. Compare all local areas →
Gas stations in Illinois
Stations color-coded by brand — the panel ranks the providers and you can filter to one brand. Move the map anywhere in Illinois and press “Search this area”.
Locations onlyNo public station-price feed exists here, so pins show locations, brands and directions only. Prices on this page are area averages. Locations come from OpenStreetMap, a volunteer-edited map, so a new or rebranded station can be missing until someone updates it.
Explore stations, fuel options and directions.
a gallon more for premium than regular in Illinois. How that compares with every other state, and whether your car needs it.
Where gas is cheapest in Illinois: prices by metro area
AAA reports separate daily averages for 17 Illinois metros — $0.83 a gallon between the cheapest and the dearest.
- 1East Saint Louis$4.53
- 2Champaign & Urbana$4.64
- 3Moline & Rock Island$4.70
- 4Decatur$4.74
- 5Bloomington & Normal$4.74
- 6Carbondale & Marion$4.74
- 7Springfield$4.77
- 8Danville$4.78
- 9Peoria & Pekin$4.79
- 10Quincy$4.79
- 11Rockford$4.88
- 12Kankakee & Bradley$4.91
- 13Lake County$4.94
- 14Elgin$4.94
- 15Chicago Metro$5.08
- 16Alexander County$5.15
- 17City of Chicago$5.37
AAA metro averages · 2026-10-25
What a tank costs in Illinois, and how much of it is tax
- Compact — 12 gal$58.73
- Sedan / crossover — 15 gal$73.41
- SUV — 20 gal$97.88
- Full-size pickup — 26 gal$127.24
Tax is 17% of the pump price in Illinois. Counties and cities here may add a local fuel tax on top, which this does not include. Pre-tax figure is an estimate — state rates as of 2026-01-01.
Illinois compared with neighbouring states
Where the line is worth crossing, and where it is not — each comparison shows how much of the gap is tax rather than the fuel itself.
- North Carolina$3.50
- Georgia$3.66
- Texas$3.72
- South Carolina$3.78
- Louisiana$3.79
- Alabama$3.82
- Tennessee$3.82
- Mississippi$3.84
- Arkansas$3.85
- Delaware$3.91
- Oklahoma$3.92
- Missouri$3.93
- Kansas$3.94
- Maryland$3.98
- Indiana$4.00
- Kentucky$4.04
- Virginia$4.05
- Florida$4.11
- North Dakota$4.11
- Rhode Island$4.15
- New Jersey$4.17
- Iowa$4.20
- Minnesota$4.20
- West Virginia$4.20
- South Dakota$4.21
- New Hampshire$4.21
- New Mexico$4.22
- Massachusetts$4.23
- Maine$4.30
- Connecticut$4.30
- Nebraska$4.32
- Vermont$4.36
- District of Columbia$4.36
- New York$4.38
- Montana$4.40
- Wyoming$4.41
- Ohio$4.42
- Pennsylvania$4.44
- Colorado$4.46
- Arizona$4.52
- Wisconsin$4.53
- Utah$4.66
- Idaho$4.69
- Michigan$4.83
- Alaska$4.86
- Oregon$4.87
- Illinois$4.89
- Nevada$5.30
- Washington$5.31
- Hawaii$5.66
- California$6.02
The answer, in full — and where it comes from
As of 25 October 2026, regular gasoline in Illinois averages $4.89/gal, the state average. Source: Daily fuel gauge report, AAA (a third-party aggregator, published daily). Retrieved by FuelWide on 25 October 2026.
Midgrade gasoline in Illinois averages $5.50/gal. Premium gasoline in Illinois averages $6.04/gal. Diesel in Illinois averages $6.70/gal.
- Price:
- $4.89/gal
- Fuel:
- Regular gasoline
- Price basis:
- State average
- Applies to:
- Illinois (state level)
- Measured:
- 2026-10-25
- Retrieved:
- 2026-10-25
- Source:
- AAA — a third-party aggregator
Daily fuel gauge report · State and metro averages: AAA · How we measure this
Tools for drivers in Illinois
Frequently asked questions
How much is gas in Illinois right now?
Regular gasoline in Illinois averages $4.89 per gallon today (AAA daily state average). Midgrade is $5.50, premium $6.04 and diesel $6.70.
Is gas in Illinois expensive compared to other states?
Illinois ranks 47 of 51 states from cheapest to most expensive for regular gas this week.
Is gas in Illinois above or below the US average?
Regular in Illinois is 13.5% above the unweighted mean of AAA's 51 state averages ($4.31/gal), measured on 2026-10-25. The EIA publishes a separate, volume-weighted national average weekly; the two are different measurements and will not match.
How much is diesel in Illinois today?
Diesel averages $6.70 a gallon in Illinois today (AAA daily state average), up 2.1% on a week earlier. A 30-gallon pickup fill costs about $201.00.
How have gas prices in Illinois changed recently?
Regular gas in Illinois is up 4.7% on a week ago, up 1.4% on a month ago, up 50.7% on a year ago, according to AAA's daily state averages.
Where is gas cheapest in Illinois?
Among the 17 Illinois metro areas AAA reports, East Saint Louis is cheapest at $4.53 a gallon for regular and City of Chicago dearest at $5.37. These are area averages; individual stations vary.
How much tax is on a gallon of diesel in Illinois?
$0.99 a gallon — $0.24 federal plus $0.75 in Illinois state taxes and fees, the 2 highest of 51 states. That is about 15% of today's pump price of $6.70. Rates as of 2026-01-01.
How much tax is on a gallon of gas in Illinois?
$0.85 a gallon — $0.18 federal plus $0.67 in Illinois state taxes and fees, the 2 highest of 51 states. That is about 17% of the pump price. Counties and cities in Illinois may add a local fuel tax on top of this. Rates as of 2026-01-01.
How much does it cost to fill up in Illinois?
At today's average of $4.89 a gallon, a 15-gallon sedan tank costs $73.41 to fill from empty, and a 26-gallon full-size pickup $127.24.
Why this price is what it is
- Premium vs. Regular Gas: Is Premium Actually Worth It?Premium costs more per gallon — but does it help your car? Here's when premium is worth it, when it's wasted money, and what octane really does.
- Fuel Taxes Explained: What You Really Pay Per GallonA big slice of every gallon is tax — but how much, and where does it go? A clear guide to federal, state and European fuel taxes.
- The Best Day and Time to Buy Gas (Backed by Price Data)Studies of billions of transactions point to early in the week as the cheapest time to fill up. Here's the best day, the best time of day, and why it works.