Spearfish Average Gas Price
| Regular | Mid-Grade | Premium | Diesel | E85 | |
|---|---|---|---|---|---|
| Week Ago Avg. | $4.22 | $4.04 | $4.71 | $4.93 | - |
| Month Ago Avg. | $4.22 | $4.04 | $4.71 | $4.93 | - |
Highest Recorded Average Gas Price In Spearfish Year to Date
| Price | Date | |
|---|---|---|
| Diesel | $4.93 | 06/15/26 |
| Regular | $4.22 | 06/15/26 |
Top 10 Gas Stations & Cheap Fuel Prices in Spearfish
Phillips 66 in Spearfish (2615 E Colorado Blvd)
2615 E Colorado Blvd, Spearfish, South Dakota,
$3.01
Jul 19, 2026
0¢ Cashback
Phillips 66 in Spearfish (706 N Main St )
706 N Main St , Spearfish, South Dakota,
$3.97
Jul 19, 2026
0¢ Cashback
Conoco in Spearfish (611 E Jackson Blvd)
611 E Jackson Blvd, Spearfish, South Dakota,
$3.99
Jul 19, 2026
0¢ Cashback
Conoco in Spearfish (820 E Colorado Blvd)
820 E Colorado Blvd, Spearfish, South Dakota,
$3.99
Jul 19, 2026
0¢ Cashback
Yesway in Spearfish (2728 N 1st Ave)
2728 N 1st Ave, Spearfish, South Dakota,
$4.19
Jul 19, 2026
0¢ Cashback
Phillips 66 in Spearfish (3275 Old Belle Rd)
3275 Old Belle Rd, Spearfish, South Dakota,
$4.19
Jul 19, 2026
0¢ Cashback
Cenex in Spearfish (6764 E Colorado Blvd Spearfish SD 57783)
6764 E Colorado Blvd Spearfish SD 57783, Spearfish, South Dakota,
$4.39
Jul 19, 2026
0¢ Cashback
Safeway in Spearfish (1606 North Ave)
1606 North Ave, Spearfish, South Dakota,
$4.39
Jul 19, 2026
0¢ Cashback
Exxon in Spearfish (546 W Jackson Blvd)
546 W Jackson Blvd, Spearfish, South Dakota,
$4.45
Jul 19, 2026
0¢ Cashback
Loaf 'N Jug in Spearfish (813 N Main St)
813 N Main St, Spearfish, South Dakota,
$4.56
Jul 19, 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.