Ontario Costco Gas Prices
Find the cheapest Costco gas in Ontario— every fuel center ranked by today's price.
27 Costco fuel centers in 21 cities · 1 of 27 sell diesel
All prices in CAD per litre.
Costco operates 27 fuel centers in Ontario across 21 cities, with the largest cluster in Etobicoke (2 stations). Across the province, regular gas averages 149.4¢, premium runs about 26.2¢ higher at 175.6¢, and diesel sits at 168.9¢. The lowest-priced regular pump is at Costco N Mississauga in Mississauga at 141.9¢, while S London in London sits about 13.0¢ higher. Across the province, regular pump prices have eased about 11.5¢ over the past month, from 160.9¢ a month ago. Premium has eased about 9.2¢ and diesel has eased about 14.0¢ over the same period. Diesel is sold at 1 of the 27 Ontario locations.
If your vehicle takes premium, the lowest in Ontario is Costco Windsor in Windsor at 167.9¢. The cheapest diesel is at Costco N London in London at 168.9¢. Pump prices shift from one warehouse to the next with local taxes, fuel-blend rules, and transport costs, but Costco fuel is members-only and usually runs below nearby branded stations — which is what keeps these pumps busy.
30-day Ontario average price trend
Browse Ontario cities
All Ontario stations by price
| Station | Regular | Premium |
|---|---|---|
| N Mississauga Mississauga | 141.9¢ | 169.9¢ |
| NW Vaughan Woodbridge | 141.9¢ | 169.9¢ |
| N Oshawa Oshawa | 142.9¢ | 199.9¢ |
| Vaughan Woodbridge | 144.9¢ | 169.9¢ |
| Newmarket Newmarket | 145.9¢ | 169.9¢ |
| Stoney Creek Stoney Creek | 145.9¢ | 169.9¢ |
| Barrie Barrie | 146.9¢ | 172.9¢ |
| Orillia Orillia | 146.9¢ | 169.9¢ |
| Scarborough Scarborough | 146.9¢ | 169.9¢ |
| Niagara Falls Niagara Falls | 147.9¢ | 184.9¢ |
Prices in CAD per litre.
Frequently asked questions
Which Costco has the cheapest gas in Ontario?
As of the latest daily update, Costco N Mississauga in Mississauga has the cheapest regular gas in Ontario at 141.9¢ CAD per litre. Pump prices change daily, so check the ranking on this page for the current order.
How much is Costco gas in Ontario right now?
Across the 27 Costco fuel centers in Ontario, regular averages 149.4¢ CAD per litre, premium 175.6¢, and diesel 168.9¢. Those are averages of the latest pump prices — individual stations vary, so see the per-station table on this page.
Does Costco sell diesel in Ontario?
Yes — 1 of the 27 Costco fuel centers in Ontario sells diesel, averaging 168.9¢ CAD per litre. Availability varies by warehouse, so check the table above first.
Is Costco gas in Ontario cheaper than average?
Ontario Costco regular averages 149.4¢, about 5.8¢ lower than the national Canadian Costco average of 155.2¢. Wherever you fill up, Costco fuel is usually priced below nearby branded stations.
Do you need a Costco membership to buy gas in Ontario?
Yes — Costco gas bars in Ontario are members-only. You scan a membership card or a Costco Shop Card at the pump before fueling; non-members can't buy fuel at Costco.
How do you pay for gas at Costco in Ontario?
Costco gas bars in Ontario take Mastercard, debit (including Visa Debit), a Costco Shop Card, and Apple Pay or Google Pay — but not Visa or Amex credit cards, and no cash at the pump.
What time do Costco gas bars open in Ontario?
Hours vary by location, and the gas bar usually opens earlier and closes later than the warehouse itself. For example, the gas bar at Costco N Mississauga runs 6AM – 9:30PM on weekdays. Check the individual station page for exact hours before a long drive.