Gas Prices in Rapid City, SD Today
Updated April 5, 2026 — Prices updated regularly from EIA data
Average Regular Unleaded — Rapid City, South Dakota
Current Gas Prices in Rapid City
Rapid City, South Dakota gas prices are running $$3.10 per gallon this {month}. The local fuel market reflects South Dakota's {taxNote} tax rate alongside Rapid City's position in the regional supply chain.
| Fuel Type | Price / Gallon | Grade | Trend |
|---|---|---|---|
| Regular Unleaded | $3.10 | 87 octane | ▲ Rising |
| Mid-Grade | $3.58 | 89 octane | ▲ Rising |
| Premium | $3.87 | 91-93 octane | ▲ Rising |
| Diesel | $4.20 | N/A | ▲ Rising |
Price Comparison
About Gas Prices in Rapid City
What makes Rapid City's gas market tick? Supply to Rapid City stations primarily flows through regional pipeline networks, keeping inventory stable but creating price sensitivity to any regional supply disruption. Seasonal demand peaks in summer and dips in winter, though South Dakota's climate moderates some of this variation.
Gas Prices by Brand in This City
Estimated prices based on brand modifiers. Sorted cheapest to most expensive.
Fuel Type Prices in This City
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