Costco South Dakota Gas Prices

Costco operates 1 fuel center in South Dakota, all in Sioux Falls. Across the state, regular gas averages $3.699 and premium runs about $0.820 higher at $4.519. Across the state, regular pump prices have eased about $0.070 over the past month, from $3.769 a month ago. Premium has eased about $0.080 over the same period.

If your vehicle takes premium, the lowest in South Dakota is Costco Sioux Falls in Sioux Falls at $4.519. Pump prices shift from one warehouse to the next with local taxes, fuel-blend rules, and transport costs, but Costco fuel is members-only and usually runs below nearby branded stations — which is what keeps these pumps busy.