Gas prices in Rapid City, SD

About gas prices in Rapid City, SD

South Dakota draws pipeline supply from refineries in Wyoming (Cheyenne, Sinclair), North Dakota (Mandan), and Minnesota (Pine Bend), with no significant in-state refining. The state gas tax is around 30 cents per gallon. Sioux Falls, Rapid City, and Aberdeen see fairly competitive pricing within the state, with Costco (in Sioux Falls), Sam's Club, Casey's General Store, and Coborn's grocery fuel leading on value. Western South Dakota near the Wyoming border occasionally runs 5 to 10 cents below eastern South Dakota due to shorter pipeline distances from Wyoming refineries. The Black Hills tourist region sees moderate seasonal price increases during summer.