Gas Prices in Sioux Falls, SD
Updated May 20, 2026 · AAA data · Regular unleaded
Gas Prices in Sioux Falls
Sioux Falls has the most competitive gas pricing in South Dakota, driven by Casey's and Holiday station competition and good Midwest pipeline access. The city is dramatically cheaper than the Black Hills and tourist corridor markets to the west.
Prices at individual stations can vary by 5–15 cents within the same city depending on brand, location, and local competition. Use apps like GasBuddy to find the cheapest station near you in Sioux Falls.
Frequently Asked Questions
What is the gas price in Sioux Falls right now?
The average regular unleaded price in Sioux Falls, South Dakota is $4.340/gal as of May 20, 2026. Station prices vary — expect a range of roughly $4.240 to $4.460 across the metro area.
Is Sioux Falls gas cheap for South Dakota?
Yes — Sioux Falls is the cheapest major market in the state. Its eastern location provides better pipeline access from Midwest refinery infrastructure, and the concentration of Casey's and Holiday stations creates strong price competition.
Where is cheapest gas in Sioux Falls?
Casey's and Holiday stations throughout the metro offer the best everyday prices. Lewis Drug fuel stations are a local favorite. Costco in Sioux Falls provides excellent prices for members. Gas in Brandon and Tea on the suburban edge often runs at or slightly below city prices.
When is the cheapest day to buy gas in Sioux Falls?
Nationwide data shows Monday and Tuesday tend to have slightly lower gas prices before weekly demand picks up. Avoid buying gas Thursday through Saturday when prices are typically higher.