The short answer
Yes — but only at select warehouses, not every one. Of the 570 U.S. Costco fuel stations we track, 63 sell diesel (about 11%, or roughly one in six), at an average of $5.27 a gallon today. Availability swings hard by country: nearly every Costco in the UK, Australia, and New Zealand pumps diesel, while Costco in Mexico sells none. Not sure about your warehouse? Search any Costco below— its station page shows whether it has diesel and today's price.
Costco's fuel menu is short — regular, premium, and diesel. Regular and premium are at every Costco gas station; diesel is the one that's hit-or-miss by location. Here's exactly where it's sold, what it costs today, and how to check your own warehouse. The figures below refresh daily from the stations we track (last updated June 21, 2026).
Does every Costco sell diesel?
No. Costco offers diesel at select locations rather than chain-wide. Right now, 63 of the 570 U.S. Costco fuel stations we track post a diesel price — about 11% — spread across 21 states. Whether a given warehouse sells diesel comes down to its fuel-center size, local demand, and permitting; newer and larger fuel centers are the most likely to have a dedicated diesel lane. Because it's a per-warehouse decision, the only reliable way to know is to check the specific station — which you can do in the search box further down.
Today's Costco diesel price
Across the U.S., Costco diesel averages about $5.27 a gallon today, ranging from $3.989 at the cheapest tracked station to $6.759 at the priciest. Like its gasoline, Costco diesel is guaranteed Kirkland Signature™ fuel and usually sits below the local average. Here's how diesel availability and today's average price compare across every market we track:
| Country | Stations selling diesel | Today's avg diesel |
|---|---|---|
| United States | 63 of 570 | $5.27/gal |
| Canada | 6 of 78 | 171.2¢/L |
| United Kingdom | 21 of 21(all) | 162.4p/L |
| Australia | 14 of 14(all) | $1.766/L |
| New Zealand | 1 of 1(all) | $2.447/L |
| Mexico | 0 of 18(none) | — |
Units follow each market: $/gallon in the U.S., ¢/L in Canada, p/L in the UK, and $/L in Australia and New Zealand. Averages cover the Costco stations we track that report a live diesel price; refreshed June 21, 2026.
The split is striking. Diesel is a default in Europe and Australia, so nearly every Costco fuel station in the UK and Australia sells it — as does New Zealand's lone warehouse. The U.S. sits in the middle at roughly one in six, Canada is thinner still, and Costco Mexico sells no diesel at all at its fuel stations.
Which U.S. states have the most Costco diesel?
Diesel clusters on the coasts and in big freight states. These are the U.S. states with the most Costco stations selling diesel right now, with today's average diesel price in each:
| State | Costco stations with diesel | Avg diesel |
|---|---|---|
| California | 16 | $6.09/gal |
| Washington | 12 | $5.79/gal |
| Texas | 6 | $4.14/gal |
| Utah | 5 | $4.66/gal |
| Oregon | 3 | $5.39/gal |
| Arizona | 2 | $4.85/gal |
| Colorado | 2 | $4.74/gal |
| Idaho | 2 | $4.75/gal |
Costco diesel stations in the top states
A few example warehouses that sell diesel in the leading states — sorted by today's diesel price, cheapest first. Tap any station for its full price history, hours, and address:
California · 16 Costco stations with diesel
- Costco Oxnard$5.559/gal
- Costco N Fresno$5.599/gal
- Costco Roseville$5.799/gal
Washington · 12 Costco stations with diesel
- Costco Clarkston$5.299/gal
- Costco Vancouver$5.359/gal
- Costco Bellingham$5.499/gal
Texas · 6 Costco stations with diesel
- Costco Weatherford$3.989/gal
- Costco Midland$3.999/gal
- Costco Lubbock$4.149/gal
Utah · 5 Costco stations with diesel
- Costco Sandy$4.599/gal
- Costco South Jordan$4.599/gal
- Costco St George$4.599/gal
Search any Costco for diesel
Use the search below to look up any Costco fuel station — by city, state or region, or postal code — in any country we cover. Open a station's page and it shows whether it sells diesel, plus today's diesel, regular, and premium prices and a 30-day history.
Does your Costco have diesel?
Search any warehouse worldwide — U.S., Canada, UK, Australia, New Zealand, or Mexico.
Buying diesel at Costco: what to know
- Members only. The pump reads your membership card, so you generally need a Costco membership to fuel up — diesel included. The exception is a Costco Shop Card, which a non-member can use in the U.S.
- Card-only payment.There's no cash at the pump, and the accepted card differs by country — see our payment methods guide.
- Check the hours.Fuel-center hours are shorter than a 24/7 truck stop's, and diesel lanes at busy warehouses can back up. Each station page lists its current gas-station hours.
Frequently asked questions
Does every Costco have diesel?
No. Costco sells diesel only at select warehouses, not all of them. Of the 570 U.S. Costco fuel stations we track, 63 — about 11%, or roughly one in six — post a diesel price. Diesel is far more common abroad: nearly every Costco fuel station in the UK, Australia, and New Zealand sells it, while Costco in Mexico currently sells none.
How do I find a Costco that sells diesel?
Search your warehouse in the box on this page (it covers every country we track) and open its station page — if it sells diesel, today’s diesel price is listed alongside regular and premium. When in doubt, call the fuel center before you drive out; diesel availability is set per warehouse and can change.
How much is Costco diesel today?
Across the U.S. Costco stations we track, diesel averages about $5.27 a gallon right now, ranging from $3.989 to $6.759 depending on the location. Costco diesel typically runs a little under the local average, the same way its gasoline does. The country table above lists today’s average for the UK, Canada, Australia, and New Zealand too.
Is Costco diesel good quality?
Costco diesel is standard ultra-low-sulfur diesel (ULSD) — the same grade every on-road diesel pump in the U.S. is required to sell — bought from the same major suppliers as other stations. As with its gasoline, Costco runs its fuel on thin margins, so the diesel is usually priced below nearby stations.
Does Costco have diesel in the UK, Canada, or Australia?
Yes in the UK and Australia — essentially every Costco fuel station in both sells diesel (21 of 21 UK stations and 14 of 14 in Australia in our data). Canada is the outlier among English-speaking markets: only 6 of 78 Costco gas bars we track list diesel. New Zealand’s single warehouse sells it; Mexico’s stations don’t.
Can non-members buy Costco diesel?
Generally no — the pump reads an active membership card, just like for gasoline. The one workaround in the U.S. is paying with a Costco Shop Card, which a non-member can use once a member has bought it for them.
Diesel availability and prices change — figures on this page refresh daily from the Costco stations we track and were last updated June 21, 2026. Always confirm the price at the pump. This site is independent and not affiliated with Costco Wholesale Corporation.
