Gas Prices in Thornton, CO Today

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

$3.02

Average Regular Unleaded — Thornton, Colorado

Current Gas Prices in Thornton

The average cost to fill up in Thornton, Colorado is $$3.02 per gallon for regular gas right now. Compared to the national average, Thornton drivers are paying $0.97 below the national average, reflecting local market dynamics.

Fuel TypePrice / GallonGradeTrend
Regular Unleaded$3.0287 octane▲ Rising
Mid-Grade$3.4989 octane▲ Rising
Premium$3.7791-93 octane▲ Rising
Diesel$4.09N/A▲ Rising

Price Comparison

Thornton Average
$3.02
Regular Unleaded
Colorado State Average
$2.93
$0.09 above the Colorado average
National Average
$3.99
$0.97 below the national average

About Gas Prices in Thornton

The Thornton fuel market reflects Colorado's broader pricing environment while adding local demand characteristics. With a growing population and rising commuter traffic, demand pressure in Thornton is steady. Warehouse club stations and discount brands regularly beat street prices by 10-20 cents per gallon.

Gas Prices by Brand in This City

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

CHEAPEST
Costco
$2.87
Speedway
$2.99
Circle K
$3.00
Sunoco
$3.03
Marathon
$3.04
BP
$3.06
Mobil
$3.07
Exxon
$3.08
Shell
$3.10
Chevron
$3.12

Fuel Type Prices in This City

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

Gas Prices in Nearby Cities

Arvada$2.89Denver$3.18Aurora$2.99Lakewood$3.20Boulder$3.19Fort Collins$3.10Colorado Springs$3.20Cheyenne$3.00
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Frequently Asked Questions

Gas price spikes in Thornton are typically triggered by regional supply disruptions, pipeline outages, refinery maintenance, seasonal blend transitions, and global crude oil price increases. Holiday demand surges around Memorial Day, July 4th, and Labor Day also push prices up temporarily.
Premium gas in Thornton 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 Thornton 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 Thornton average of $$3.02 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 Thornton. Prices rise Thursday through Sunday as weekend driving demand increases. Filling up Tuesday afternoon before price adjustments is a reliable strategy.

Related Gas Price Pages

Gas Prices in ColoradoCheapest Gas in ThorntonGas Prices Near ThorntonCompare All StatesRegular Unleaded in ThorntonPremium Gasoline in ThorntonDiesel Fuel in ThorntonShell - ThorntonExxon - ThorntonBP - ThorntonChevron - ThorntonMobil - ThorntonGas Prices in ArvadaGas Prices in DenverGas Prices in Aurora