Montana Gas Prices
Average price per gallon in Montana, updated 9/5/26 from AAA. Regular is currently $4.39/gal — $0.24 above the national average of $4.15.
Regular
$4.39
Mid-grade
$4.73
Premium
$5.07
Diesel
$5.68
Regular, change:▲ +$0.01 today→ $0.00 wk▲ +$0.13 mo
Regular — recent trend (92 days)
$4.41$3.90
Cheapest metros in Montana
| Metro | Regular | Diesel |
|---|---|---|
| Billings | $4.35 | $5.63 |
| Missoula | $4.37 | $5.67 |
| Great Falls | $4.39 | $5.82 |