Costco South Dakota Gas Prices

Costco operates 1 fuel center in South Dakota, all in Sioux Falls. Across the state, regular gas averages $3.949 and premium runs about $1.010 higher at $4.959. Across the state, regular pump prices have eased about $0.230 over the past month, from $4.179 a month ago. Premium has eased about $0.040 over the same period.

If your vehicle takes premium, the lowest in South Dakota is Costco Sioux Falls in Sioux Falls at $4.959. 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.