Spearfish, SD
Loading prices
LiveUpdated Jun 23Gas prices near 57783
Spearfish, SD · SD average $3.92/gal
Stations near you
No results found
Try a different ZIP code
Keep exploring
Gas prices in Spearfish, SD 57783 fluctuate daily based on crude oil markets and local supply costs. As a smaller city in the northern Great Plains, Spearfish typically enjoys more affordable fuel than coastal states, though prices depend on regional refinery production and transportation distances. Check current prices regularly since rates vary between stations around town and can shift multiple times per week.
Nearby ZIP codes in Spearfish, SD
How to save more on gas in Spearfish
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.