Costco Gas Prices Sioux Falls (2025)

FAQs

What is the price of gas in Sioux Falls, South Dakota today? ›

Plan your fueling around the quieter times, typically during the middle of the week and early in the morning. Additionally, members can consult the Costco app, which sometimes offers real-time updates on gas station wait times.

The fact that gas is cheaper at Costco doesn't mean it's lower in quality. The company offers Kirkland Signature gasoline, which is formulated to improve vehicle performance and fuel economy. Costco says the gas also reduces emissions, making it better for the environment.

The company argues that rising operational costs and infrastructure investments since then necessitate another increase. “The need to increase natural gas rates in South Dakota is the compound result of 13 years of investment and inflation,” NorthWestern wrote in a letter to the commission.

South Dakota ranks near the bottom in the country for average price of gasoline, according to AAA. As of Friday, the average cost of a gallon of gas in the state is $3.975, compared to $4.013 in Wyoming and $3.924 in Iowa. Across the nation, the average gallon of gas costs $4.331.

Buy Gas on Monday or Tuesday

“For gas, Mondays and Tuesdays tend to be the cheapest days to fill up your tank as demand is lower at the beginning of the week,” Anderson said.

Costco is listed as a TOP TIER™ gasoline retailer. Find out more at www.toptiergas.com.

You can save money on gas at Costco by virtue of the store's lower price per gallon. But you can also save money on gas by combining a grocery run and a fill-up. If you don't have to drive to a different gas station, you won't have to use gas to get there.

Q: Where does Costco get its fuel? A: Costco buys fuel from major refineries and distributors in each area. All Kirkland Signature™ Fuel is guaranteed, just like the merchandise we sell inside the warehouse.

Can I get into Costco if I forgot my card? ›

Costco requires you to show your membership card to even get inside, so if you don't have one, you'll have to speak to the employee at the front door to gain entrance. Simply mention that you're there for any of the reasons listed below, and they should let you in.

You must be logged in to Costco.com and have a valid Costco Membership number saved in your online account to view pricing and/or purchase Member Only Items. When viewing product details, you will be prompted to login to your account to display pricing and enable the Add to Cart button.

The Walmart+ fuel footprint now overshadows Costco, which runs just 573 locations in the U.S., though not all include a fuel station. But Costco's prices are consistently recognized as the lowest in the industry, according to fuel price tracking app GasBuddy.

The data shows that Costco's prices aren't typically the absolute cheapest, but they're always significantly less expensive than the "average" price. This means you're more than likely getting a deal when you get gas from Costco versus another random gas station in your city.

The short answer is that unlike pretty much every other retail business that sells gasoline, Costco doesn't care about making money from its gas pumps. In fact, Costco typically sells its gas at a moderate loss. Why would Costco do this? It's not an act of charity.