Montana Gas Prices
Average retail price · Source: AAA · Updated daily
Today's Average
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per gallon · regular unleaded
Montana pays above-average prices due to its vast geographic isolation — the state has very few refineries and long distances between supply points. Cenex, a cooperative fuel brand, is the most common station type in rural Montana.
⛽ Gas Tax: 33¢/gallon
Ranked #15 most expensive nationally
Top Gas Station Chains in Montana
CenexExxonShellTesoroCostco
Top Montana Cities for Gas Prices
Montana Gas Price FAQ
Is Montana gas expensive?
Montana runs above average nationally, primarily due to isolation from major pipeline infrastructure and the sheer cost of distributing fuel across a massive, sparsely populated state. Billings, near the state's only refinery, has the most competitive prices.
Where is gas cheapest in Montana?
Billings benefits from proximity to the CHS refinery and has the most competitive prices in the state. Costco in Billings and Missoula offers the lowest single-station prices. Remote areas like the Hi-Line and far eastern Montana pay the biggest premiums.
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Gas Prices by City in Montana
Montana Gas Price — Frequently Asked Questions
What is the average gas price in Montana today?
Montana gas prices are updated daily from AAA data. Check back for today's average.
Why are gas prices lower in Montana than the national average?
Montana benefits from favorable regional factors.
What is Montana's gas tax?
Montana's state gas tax is approximately 33¢ per gallon. This is a combined state excise tax and in some states includes local levies. The federal gas tax adds an additional 18.4¢/gal on top of state taxes.
When is the cheapest time to buy gas in Montana?
Gas prices in Montana — like across the US — tend to be lowest on Mondays and Tuesdays, when weekly demand is lowest. Prices typically rise Thursday through Saturday as weekend travel demand increases. Avoiding fill-ups on Fridays and Saturdays can save 3–8¢/gal on average. Montana prices also tend to be lower in late fall and winter when summer-blend fuel requirements end.
Which cities in Montana have the cheapest gas?
Gas prices vary by city within Montana based on local competition, distance from fuel terminals, and population density. Use our city pages to compare prices across Montana: cities farther from major metro areas and distribution hubs often have slightly higher prices due to transport costs, while high-competition suburban areas near major highways tend to be cheapest.