Regular Unleaded Prices in Idaho Falls, ID

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

$3.41

Regular Unleaded (87 octane) per gallon

About Regular Unleaded in Idaho Falls

At $$3.41 per gallon, regular gas in Idaho Falls, Idaho is {comparison} the national average for 87-octane fuel. Most commuters and everyday drivers have no reason to buy anything other than regular.

When to Use Regular Unleaded

Best for: everyday driving

Vehicle types: most cars and trucks

Fuel Price Comparison in Idaho Falls

Fuel TypePricevs. Regular UnleadedOctane
Regular Unleaded THIS PAGE$3.41—87
Premium Gasoline$4.26+$0.8591-93
Diesel Fuel$4.62+$1.21N/A

Regular Unleaded in Nearby Cities

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Frequently Asked Questions

Regular Unleaded costs more due to the additional refining required to achieve its specifications. Higher octane fuel requires more complex blending processes. The markup reflects real production costs, not arbitrary station pricing.
Check your vehicle's owner manual or the inside of your fuel door. Required means you must use that grade to avoid damage. Recommended means optimal performance uses that grade but lower grades are tolerable. Regular means 87 octane is sufficient.
For vehicles designed to use Regular Unleaded, using the correct grade maintains engineered fuel economy. Upgrading from regular to premium in a regular-fuel car produces no economy improvement. Using regular in a premium-required car may reduce fuel economy slightly.
National Regular Unleaded prices average ${natPrice} per gallon. Idaho Falls's current price of $$3.41 is {comparison} the national average. Regional refinery access and state tax differences drive most of the variation.

Related Gas Price Pages

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