Arizona Costco Gas Prices

Costco operates 19 fuel centers in Arizona across 13 cities, with the largest cluster in Phoenix (4 stations). Across the state, regular gas averages $4.527, premium runs about $0.56 higher at $5.086, and diesel sits at $5.629. The lowest-priced regular pump is at Costco NW Tucson in Tucson at $4.299, while Scottsdale in Scottsdale sits about $0.40 higher. Across the state, regular pump prices have climbed about $0.21 over the past two weeks, from $4.317 two weeks ago. Premium has climbed about $0.26 and diesel has climbed about $0.08 over the same period. Diesel is sold at 2 of the 19 Arizona locations.