Costco Idaho Gas Prices

Costco operates 7 fuel centers in Idaho, spread across 7 cities. Across the state, regular gas averages $4.576, premium runs about $0.520 higher at $5.096, and diesel sits at $6.129. The lowest-priced regular pump is at Costco Coeur d Alene in Coeur D' Alene at $4.299, while Nampa in Nampa sits about $0.400 higher. Across the state, regular pump prices have eased about $0.069 over the past month, from $4.645 a month ago. Diesel has eased about $0.160 over the same period. Diesel is sold at 2 of the 7 Idaho locations.

If your vehicle takes premium, the lowest in Idaho is Costco Coeur d Alene in Coeur D' Alene at $4.859. The cheapest diesel is at Costco Idaho Falls in Idaho Falls at $5.899. 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.