Current fuel prices for South Dakota (SD) — Updated June 3, 2026
South Dakota has no state income tax and relatively low fuel taxes. Sioux Falls is the main distribution hub. However, western South Dakota near the Badlands and Mount Rushmore can have much higher prices.
Prices shown reflect the current average for South Dakota regular unleaded gasoline. Gas prices fluctuate daily based on crude oil markets, refinery output, seasonal demand, and state tax adjustments. South Dakota drivers typically fill up 4 times per month, making it important to know when and where prices are lowest.
Finding cheap gas in South Dakota requires knowing when and where to look. Here are proven strategies for South Dakota drivers:
Best day to buy: Studies show that Tuesday and Wednesday typically offer the lowest gas prices across South Dakota. Prices often rise on Thursday ahead of the weekend and peak on Friday and Saturday when demand is highest.
Use gas price apps: GasBuddy, Waze, and Google Maps all show current prices at nearby stations. South Dakota has a competitive gas market with frequent price changes, making real-time tracking valuable.
Loyalty programs: Many South Dakota grocery chains and gas stations offer fuel rewards. Programs like Kroger/Kroger fuel, Shell Fuel Rewards, and BPme Rewards can save $0.05–$0.25 per gallon regularly.
Fill up at Sioux Falls: Sioux Falls typically offers the most competitive gas prices in South Dakota due to higher competition among stations. Rural South Dakota areas often charge a premium.
Data source: Zyla • Last updated: June 3, 2026
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