Montana Gas Prices
Average price per gallon in Montana, updated 7/21/26 from AAA. Regular is currently $4.16/gal — $0.14 above the national average of $4.02.
Regular
$4.16
Mid-grade
$4.50
Premium
$4.81
Diesel
$4.78
Regular, change:▲ +$0.04 today▲ +$0.25 wk▼ $0.01 mo
Regular — recent trend (42 days)
Cheapest metros in Montana
| Metro | Regular | Diesel |
|---|---|---|
| Missoula | $4.14 | $4.73 |
| Great Falls | $4.14 | $4.76 |
| Billings | $4.16 | $4.73 |