Rapid City, SD
6 stations
LiveUpdated Jun 27Gas prices near 57703
Rapid City, SD · SD average $3.92/gal
Stations near you
Gas Price Check
Rapid City, SD · 57703
- Cheapest
- $3.87/gal
- Area avg
- $3.92/gal
You save4¢/gal
Keep exploring
Rapid City, SD 57703 sits in a region where gas prices tend to track with broader Midwest trends, generally staying reasonable compared to coastal states. Local stations update their prices throughout the day, so what you pay at one pump might differ just blocks away. The Black Hills area draws travelers year-round, which keeps competition steady among retailers in the 57703 ZIP code.
Today’s lowest gas prices in 57703
- 1. Sinclair at 3851 Elgin St offers regular at $3.87/gal (4.0 mi away).
- 2. Exxon at 3501 SD-44 E offers regular at $3.87/gal (2.6 mi away).
- 3. Circle K at 3216 E Hwy 44 offers regular at $3.93/gal (1.8 mi away).
- 4. Conoco at 4030 Cheyenne Blvd offers regular at $3.97/gal (5.1 mi away).
- 5. Conoco at 3229 Teewinot Dr offers regular at $4.09/gal (3.9 mi away).
Prices are aggregated from station-level data and refreshed daily.
Nearby ZIP codes in Rapid City, SD
How to save more on gas in Rapid City
1. Use warehouse clubs
Costco and Sam’s Club typically price 15-25 cents per gallon below nearby stations. Membership pays for itself within a few fill-ups.
2. Fill up early in the week
Stations often raise prices Thursday for weekend demand. Fill up Monday through Wednesday to avoid the lift.
3. Keep tires properly inflated
Properly inflated tires improve fuel economy by up to 3 percent at current prices. Check pressure once a month.
4. Check back tomorrow
Prices can shift 10-20 cents overnight during volatile markets. A quick check before you leave home avoids paying yesterday’s spike.
5. Pay cash at split-pricing stations
Stations with cash and credit split pricing typically save an average of 10 cents per gallon when you pay cash.
Related guides
Deep-dives on US gas-price topics relevant to this area.
Brand
Sam's Club gas prices
Member-only fuel pricing at Sam's Club warehouse-club locations.
Research
Diesel vs gasoline economics in 2026
Why diesel costs more than gas now. Refining yield and global demand.
Research
Federal gas tax holiday economics
Pass-through math, refiner-margin capture, and why political timing matters.
Directory
US gas station brands directory
Reference for 39 major US gas station chains.
About gas prices in South Dakota
South Dakota draws pipeline supply from refineries in Wyoming (Cheyenne, Sinclair), North Dakota (Mandan), and Minnesota (Pine Bend), with no significant in-state refining. The state gas tax is around 30 cents per gallon. Sioux Falls, Rapid City, and Aberdeen see fairly competitive pricing within the state, with Costco (in Sioux Falls), Sam's Club, Casey's General Store, and Coborn's grocery fuel leading on value. Western South Dakota near the Wyoming border occasionally runs 5 to 10 cents below eastern South Dakota due to shorter pipeline distances from Wyoming refineries. The Black Hills tourist region sees moderate seasonal price increases during summer.