South Dakota Gas Prices
Average price per gallon in South Dakota, updated 7/21/26 from AAA. Regular is currently $3.92/gal — $0.10 below the national average of $4.02.
Regular
$3.92
Mid-grade
$4.11
Premium
$4.62
Diesel
$4.72
Regular, change:▲ +$0.05 today▲ +$0.23 wk→ $0.00 mo
Regular — recent trend (42 days)
Cheapest metros in South Dakota
| Metro | Regular | Diesel |
|---|---|---|
| North Sioux City | $3.87 | $4.75 |
| Sioux Falls | $3.87 | $4.78 |
| Rapid City | $4.12 | $4.84 |