South Dakota Gas Prices
Average price per gallon in South Dakota, updated 9/5/26 from AAA. Regular is currently $4.02/gal — $0.13 below the national average of $4.15.
Regular
$4.02
Mid-grade
$4.23
Premium
$4.71
Diesel
$5.51
Regular, change:▲ +$0.01 today▼ $0.01 wk▲ +$0.03 mo
Regular — recent trend (92 days)
$4.08$3.64
Cheapest metros in South Dakota
| Metro | Regular | Diesel |
|---|---|---|
| North Sioux City | $3.85 | $5.54 |
| Sioux Falls | $3.91 | $5.47 |
| Rapid City | $4.17 | $5.59 |