Spearfish Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Week Ago Avg. | $3.24 | $3.19 | $3.8 | $3.47 | - |
| Month Ago Avg. | $3.24 | $3.19 | $3.8 | $3.47 | - |
Highest Recorded Average Gas Price In Spearfish Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $3.47 | 01/01/26 |
| Regular | $3.24 | 01/01/26 |
Top 10 Gas Stations & Cheap Fuel Prices in Spearfish
Conoco in Spearfish (611 E Jackson Blvd)
611 E Jackson Blvd, Spearfish, South Dakota,
$2.99
May 31, 2026
0¢ Cashback
Phillips 66 in Spearfish (3275 Old Belle Rd)
3275 Old Belle Rd, Spearfish, South Dakota,
$3.01
May 31, 2026
0¢ Cashback
Phillips 66 in Spearfish (2615 E Colorado Blvd)
2615 E Colorado Blvd, Spearfish, South Dakota,
$3.01
May 31, 2026
0¢ Cashback
Conoco in Spearfish (820 E Colorado Blvd)
820 E Colorado Blvd, Spearfish, South Dakota,
$3.09
May 31, 2026
0¢ Cashback
Exxon in Spearfish (546 W Jackson Blvd)
546 W Jackson Blvd, Spearfish, South Dakota,
$3.14
May 31, 2026
0¢ Cashback
Cenex in Spearfish (6764 E Colorado Blvd Spearfish SD 57783)
6764 E Colorado Blvd Spearfish SD 57783, Spearfish, South Dakota,
$3.14
May 31, 2026
0¢ Cashback
Phillips 66 in Spearfish (706 N Main St )
706 N Main St , Spearfish, South Dakota,
$3.15
May 31, 2026
0¢ Cashback
Safeway in Spearfish (1606 North Ave)
1606 North Ave, Spearfish, South Dakota,
$3.49
May 31, 2026
0¢ Cashback
Loaf 'N Jug in Spearfish (813 N Main St)
813 N Main St, Spearfish, South Dakota,
$3.58
May 31, 2026
0¢ Cashback
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Gas Data Methodology
The fuel prices published in this guide are based on the results of research completed by Way.com’s data team. Using a mix of external and internal data, we analyzed millions of prices across U.S. ZIP codes and globally.