Costco Missouri Gas Prices

Costco operates 8 fuel centers in Missouri across 6 cities, with the largest cluster in Kansas City (2 stations). Across the state, regular gas averages $3.600, premium runs about $0.631 higher at $4.231, and diesel sits at $5.159. The lowest-priced regular pump is at Costco Springfield in Springfield at $3.459, while S St Louis in Saint Louis sits about $0.240 higher. Across the state, regular pump prices have eased about $0.063 over the past month, from $3.663 a month ago. Premium has eased about $0.111 and diesel has climbed about $0.360 over the same period. Diesel is sold at 1 of the 8 Missouri locations.

If your vehicle takes premium, the lowest in Missouri is Costco Springfield in Springfield at $4.059. The cheapest diesel is at Costco N Kansas City in Kansas City at $5.159. 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.