Gas prices in Rapid City
Gas prices in Rapid CityDaily metro average from AAA (2026-07-28), per gallon including taxes, for the Rapid City area of South Dakota.
Regular
$4.25
per gallon · €0.99/L
Midgrade
$4.40
per gallon · €1.02/L
Premium
$4.87
per gallon · €1.13/L
Diesel
$5.01
per gallon · €1.16/L
▲ 3.3% vs last week ($4.12)▲ 38.8% vs a year ago ($3.06)
Nearest South Dakota metros on price
The metros immediately either side of Rapid City in South Dakota, so you can see whether paying $4.25 here is normal or not.
| Metro | Regular | vs Rapid City |
|---|---|---|
| North Sioux City | $3.88 | −$0.38 |
| Sioux Falls | $3.95 | −$0.31 |
| Rapid City | $4.25 | — |
All South Dakota gas prices →
State average, trend, station map and calculators.
Gas prices near me →
Your own area's price and a live map of the stations around you.
Frequently asked questions
How much is gas in Rapid City right now?
Regular gasoline averages $4.25 per gallon across Rapid City today (AAA metro average, 2026-07-28). Midgrade is $4.40, premium $4.87 and diesel $5.01.
Is gas cheaper in Rapid City than the rest of South Dakota?
A South Dakota state comparison is unavailable today.
Where does Rapid City rank in South Dakota?
Rapid City is the 3rd cheapest of 3 South Dakota metros AAA tracks.
Are gas prices in Rapid City higher than a year ago?
Yes — regular is 38.8% higher than this time last year ($3.06/gal then, $4.25 now).