Where to Buy Diet Coke for the Lowest Price in Canada (August 2026)
Looking for the lowest Diet Coke price in Canada? Among the current listings we checked, Walmart offered the best value at $13.97 for 24 cans, or approximately $0.58 per can. Costco Same-Day was extremely close at $18.78 for 32 cans, or approximately $0.59 per can.
Costco remains a convenient bulk option for members, but Walmart currently costs slightly less per can and requires a smaller purchase. Prices were checked on August 24, 2026, and may vary by store, province and promotion.
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When prices change or better deals become available, we’ll update our recommendations to keep our content as accurate and useful as possible.
Price When Checked (August 2026)
| Store | Package | Current Price (BC) | Cost per Can | Our Take |
|---|---|---|---|---|
| Costco | 32 × 355 mL | $18.78 | $0.59 | Excellent bulk value |
| Save-On-Foods | 12 × 355 mL | $10.99 | $0.92 | Check for promotions |
| Walmart | 12 × 355 mL | $13.97 | $0.58 | 🏆 Best current value |
| Real Canadian Superstore | 12 × 355 mL | Check current price | – | Price varies by location |
| Safeway | 12 × 355 mL | Check current price | – | Watch for promotions |
Prices checked online on August 24, 2026. Prices, taxes, deposits, availability and promotions may vary by store and province.
🏆 Our Recommendation
Walmart offered the lowest verified cost in this comparison at approximately $0.58 per can for a 24-pack. Costco Same-Day was nearly tied at approximately $0.59 per can for a 32-pack and remains an excellent bulk option for members.
Save-On-Foods listed a 12-pack at $10.99, or approximately $0.92 per can, although temporary promotions and More Rewards offers can reduce that price. Check the current flyer before purchasing.🍁 Smart Shopping Tip
Buying soft drinks by the case usually provides the lowest cost per can, but only if you’ll actually drink them before they lose their freshness. If you’re an occasional Diet Coke drinker, buying 12-packs during a good sale may save you money without taking up as much storage space.
Is Costco always the cheapest place to buy Diet Coke?
No. Walmart currently costs approximately $0.58 per can, narrowly below Costco Same-Day at approximately $0.59.
Does Walmart ever beat Costco?
Yes. Walmart’s current 24-pack price slightly beats Costco per can, while requiring you to purchase eight fewer cans.
How often is this article updated?
Great Canadian Finds reviews prices regularly and updates recommendations when significant changes occur.
Sources
- Costco Canada (checked August 24, 2026)
- Walmart Canada
- Save-On-Foods
- Real Canadian Superstore
- Safeway
Last Reviewed
Last reviewed: August 24, 2026
Great Canadian Finds regularly reviews pricing and recommendations to help Canadians make informed purchasing decisions. Prices and promotions may change without notice.
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Some links on Great Canadian Finds may be affiliate links. If you make a purchase through these links, we may earn a small commission at no additional cost to you. Our recommendations are based on independent research, current pricing, and our honest assessment of value for Canadian shoppers.
Great Canadian Finds is independently researched. We only recommend products and deals we believe offer genuine value for Canadian shoppers.
