Costco Gas Prices in South Dakota
- Regular avg
- $3.899▼ −$0.030
- Premium avg
- $4.949▼ −$0.050
- Stations reporting
- 1
Avg of 1 station · per gallon · ▲▼ change since the previous day
Average price history in South Dakota
Last 30 days · per gallonRegular: $3.959 on Oct 2 to $3.899 on Oct 31, low $3.899, high $3.999. Premium: $4.929 on Oct 2 to $4.949 on Oct 31, low $4.899, high $5.099.
Costco gas in South Dakota today
The only Costco gas station in South Dakota is at the Sioux Falls warehouse, 3700 S Grange Ave.
South Dakota has a single Costco warehouse with a gas station, so the South Dakota average above is that station’s own price rather than a spread.
Costco Regular prices in South Dakota have eased about $0.060 over the past month, from $3.959 a month ago.
- Only Costco gas station in South Dakota
- Sioux Falls — $3.899
- vs the US average
- $0.376 below, at $4.275
- Diesel
- not sold here
- Weekday opening
- 6 a.m.
- Warehouse opened
- October 2013
South Dakota stations by price
Cheapest first — page through to see more.
| Rank | Station | Location | Regular today |
|---|---|---|---|
| 1 | Sioux FallsSioux Falls | Sioux Falls | $3.899 |
Fuel grades at Costco in South Dakota
The Costco station in South Dakota sells Kirkland Signature fuel, which is Top Tier certified. None of it reported a diesel price in the last 30 days.
| Grade | Stations | Avg today | Cheapest |
|---|---|---|---|
| Regular | 1 | $3.899 | Sioux Falls $3.899 |
| Premium | 1 | $4.949 | Sioux Falls $4.949 |
Regular
1 station87-octane Kirkland Signature unleaded, the grade most cars are built for.
- Same TOP TIER detergent package as premium. The only difference between the two is octane.
- Can contain up to 10% ethanol, like most US gasoline. The pump label shows the blend.
Premium
1 stationKirkland Signature premium: 91 octane at most stations, 93 in some regions.
- Only needed if your owner’s manual requires or recommends premium. Higher octane resists engine knock; it adds nothing to an engine built for regular.
- Carries the same detergent additives as regular.
Not sold at Costco
- Mid-grade (89): Costco pumps offer regular and premium only.
- Cash sales: every Costco pump is card-only.
Is Costco gas in South Dakota good quality?
Costco does not sell a refiner’s brand. Every pump in South Dakota dispenses Costco’s own Kirkland Signature fuel, bought from major refiners and distributors in the region and finished with Costco’s additive package.
Kirkland Signature gasoline is licensed TOP TIER, the detergent standard set by automakers including GM, Ford, Toyota, Honda and BMW. Costco puts its detergent level at about five times the EPA minimum, which is what keeps intake valves and fuel injectors clear of carbon deposits. Costco’s gasoline also contains friction modifiers that it says reduce engine wear.
In short, the low price is not a lower grade. The saving comes from Costco running its gas as a membership perk on thin margins, not from the fuel.
Costco gas station hours in South Dakota
Pump hours run longer than the warehouse's, and weekends are shorter. Times are local.
| Station | Mon–Fri | Sat | Sun |
|---|---|---|---|
| Sioux Falls | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
What else is at Costco warehouses in South Dakota
Every Costco gas station sits in a warehouse parking lot, so a fill-up can share a trip with the rest of the list.
- Food court
- 1 of 1
- Pharmacy
- 1 of 1
- Optical
- 1 of 1
- Tire center
- 1 of 1
- Car wash
- 0 of 1
- EV charging
- 0 of 1
How Costco gas works in South Dakota
Bring your card. The pump asks for an active Costco membership card before it starts, at the gas station in South Dakota. Without a membership, a Costco Shop Card loaded with credit works the same way.
Pay by card. The pumps take Visa, most debit cards and the Costco Shop Card. There is no cash, and a card hold of up to $150 can show until the fill posts.
Check the price first. Each station sets its own price, usually once a day, so two Costco stations in South Dakota can differ. Today the regular average here is $3.899. The prices on this page are collected once daily and can lag a same-day change at the pump.
Go early or late. Lines are longest on weekend afternoons and weekday evenings. The first pumps here open at 6 a.m. on weekdays.
South Dakota prices by city
- Sioux Falls · 1 station$3.899
States near South Dakota
- Costco gas prices Nebraska · 4 stations$3.884
- Costco gas prices Minnesota · 15 stations$3.976
- Costco gas prices North Dakota · 2 stations$3.799
- Costco gas prices Iowa · 4 stations$3.842
- Costco gas prices Kansas · 4 stations$3.704
- Costco gas prices Missouri · 11 stations$3.653
Costco gas in South Dakota: common questions
Where is the cheapest Costco gas in South Dakota today?
South Dakota has one Costco gas station, Sioux Falls, so it is the cheapest by default: Regular is $3.899 there as of the October 31, 2026 reading.
How many Costco gas stations are there in South Dakota?
South Dakota has 1 Costco warehouse with a gas station, and it has reported a price in the last 30 days.
Does the Costco gas station in South Dakota sell diesel?
No — the one Costco gas station in South Dakota has reported no diesel price in the last 30 days. Costco sells diesel at a minority of its locations in the US.
Is Costco gas cheaper in South Dakota than in the US?
Yes — the average Costco Regular price in South Dakota is $3.899, $0.376 below the US average of $4.275 as of the October 31, 2026 reading.
Are Costco gas prices in South Dakota going up or down?
Down — the average Costco Regular price in South Dakota has eased about $0.060 over the past month, from $3.959 to $3.899.
What time do Costco gas stations in South Dakota open?
The pumps open at 6 a.m. on weekdays at the one station in South Dakota, ahead of the warehouse doors. Each station page carries its own full week, in local time.