Gas prices in Rapid City
Gas prices in Rapid CityDaily metro average from AAA (2026-09-11), per gallon including taxes, for the Rapid City area of South Dakota.
Regular
$4.32
per gallon · €0.98/L
Midgrade
$4.54
per gallon · €1.03/L
Premium
$5.00
per gallon · €1.14/L
Diesel
$5.90
per gallon · €1.34/L
up vs last week 3.2% vs last week ($4.19) up vs a year ago 38.3% vs a year ago ($3.13)
Nearest South Dakota metros on price
The metros immediately either side of Rapid City in South Dakota, so you can see whether paying $4.32 here is normal or not.
| Metro | Regular | vs Rapid City |
|---|---|---|
| Sioux Falls | $4.04 | −$0.28 |
| North Sioux City | $4.05 | −$0.27 |
| Rapid City | $4.32 | — |
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Frequently asked questions
How much is gas in Rapid City right now?
Regular gasoline averages $4.32 per gallon across Rapid City today (AAA metro average, 2026-09-11). Midgrade is $4.54, premium $5.00 and diesel $5.90.
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 38.3% higher than this time last year ($3.13/gal then, $4.32 now).