Idaho Gas Prices
Average retail price · Source: AAA · Updated daily
Today's Average
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per gallon · regular unleaded
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Gas Prices by City in Idaho
Idaho Gas Price — Frequently Asked Questions
What is the average gas price in Idaho today?
Idaho gas prices are updated daily from AAA data. Check back for today's average.
Why are gas prices lower in Idaho than the national average?
Idaho benefits from favorable regional factors.
What is Idaho's gas tax?
Idaho'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 Idaho?
Gas prices in Idaho — 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. Idaho prices also tend to be lower in late fall and winter when summer-blend fuel requirements end.
Which cities in Idaho have the cheapest gas?
Gas prices vary by city within Idaho based on local competition, distance from fuel terminals, and population density. Use our city pages to compare prices across Idaho: 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.