Gas Prices in Rockford, IL Today

Updated April 5, 2026 — Prices updated regularly from EIA data

$3.59

Average Regular Unleaded — Rockford, Illinois

Current Gas Prices in Rockford

Rockford, Illinois gas prices are running $$3.59 per gallon this {month}. The local fuel market reflects Illinois's {taxNote} tax rate alongside Rockford's position in the regional supply chain.

Fuel TypePrice / GallonGradeTrend
Regular Unleaded$3.5987 octane▲ Rising
Mid-Grade$4.1589 octane▲ Rising
Premium$4.4891-93 octane▲ Rising
Diesel$4.86N/A▲ Rising

Price Comparison

Rockford Average
$3.59
Regular Unleaded
Illinois State Average
$3.36
$0.23 above the Illinois average
National Average
$3.99
$0.40 below the national average

About Gas Prices in Rockford

What makes Rockford's gas market tick? Supply to Rockford stations primarily flows through regional pipeline networks, keeping inventory stable but creating price sensitivity to any regional supply disruption. Seasonal demand peaks in summer and dips in winter, though Illinois's climate moderates some of this variation.

Gas Prices by Brand in This City

Estimated prices based on brand modifiers. Sorted cheapest to most expensive.

CHEAPEST
Costco
$3.44
Speedway
$3.56
Circle K
$3.57
Sunoco
$3.60
Marathon
$3.61
BP
$3.63
Mobil
$3.64
Exxon
$3.65
Shell
$3.67
Chevron
$3.69

Fuel Type Prices in This City

Regular Unleaded
87 octane
Premium Gasoline
91-93 octane
Diesel Fuel
N/A

Gas Prices in Nearby Cities

Elgin$3.56Aurora$3.35Schaumburg$3.58Madison$2.94Naperville$3.43Waukegan$3.44Des Plaines$3.62Kenosha$2.84Joliet$3.32Evanston$3.47
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Frequently Asked Questions

Premium gas in Rockford is worth the extra cost only if your vehicle requires it. If your owner's manual says Required, always use premium. If it says Recommended, you may use regular with minimal performance loss. Never use regular in a vehicle that requires premium.
Costco offers the cheapest gas wherever it operates in the Rockford area. Among street stations, Circle K, Speedway, and Wawa (in applicable markets) consistently offer below-average prices. Shell, Chevron, and BP typically price above the local average.
At today's Rockford average of $$3.59 per gallon, a standard 13-gallon sedan tank costs ${fillCost} to fill. A larger 20-gallon SUV or truck tank runs ${truckFill}. Choosing the cheapest local station can save $3-5 on each fill-up.
Monday and Tuesday are statistically the cheapest days to buy gas in most US cities including Rockford. Prices rise Thursday through Sunday as weekend driving demand increases. Filling up Tuesday afternoon before price adjustments is a reliable strategy.
Rockford and surrounding cities typically track similar fuel prices given shared supply infrastructure. Differences of 5-15 cents between nearby cities are common depending on local tax differences and competition levels.

Related Gas Price Pages

Gas Prices in IllinoisCheapest Gas in RockfordGas Prices Near RockfordCompare All StatesRegular Unleaded in RockfordPremium Gasoline in RockfordDiesel Fuel in RockfordShell - RockfordExxon - RockfordBP - RockfordChevron - RockfordMobil - RockfordGas Prices in ElginGas Prices in AuroraGas Prices in Schaumburg