WK 37 · SEPTEMBER 7, 2026 · IDAHO
Idaho
$4.31
+3.8% vs national avg
Regional average — EIA publishes no weekly Idaho retail series, so this is the PADD region price your area falls into.
Now
$4.31
vs National
+3.8%
12-wk change
+$0.47
PADD region
PADD padd_4_rocky_mountain
This state is $0.16 above national — paid every fill-up, every commute.
Highest fill-up cost — Idaho avg $4.31/gal
Worst Vehicles In Idaho
Lowest fill-up cost — Idaho avg $4.31/gal
Best Vehicles In Idaho
Across the line
Neighboring states
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Source: EIA · Updated September 7, 2026