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If you love canning, fermenting, or just storing your pantry staples in something sturdy, you’ve probably asked yourself: does Costco sell mason jars? The short answer is yes — but it’s not quite that simple. Costco’s mason jar stock can shift with the seasons, and availability often depends on your local warehouse.
In this guide, we’ll break down everything you need to know about buying mason jars at Costco, how much you can expect to pay, and where to turn if your local warehouse is sold out. Whether you’re prepping for a big canning weekend or just want reliable glass storage jars for your kitchen, this article has you covered.
Yes, Costco does sell mason jars — but it’s a seasonal game. Unlike a dedicated kitchen store, Costco doesn’t always keep mason jars on the shelf year-round. Here’s what you need to know before heading to your local warehouse.
Mason jars tend to show up at Costco warehouses during peak canning and preserving season, generally from late summer through fall. This is when home canners are stocking up to preserve the harvest, and Costco responds to that seasonal demand.
Outside of this window, you might find it harder to spot mason jars on the shelves. Stock can vary by location, so it’s smart to call ahead or check with a staff member if you’re making a special trip just for mason jars.
If your local warehouse is out of stock, Costco.com can be a good backup option. Online availability for mason jars tends to be a bit more consistent than in-store stock, since it isn’t tied to the same physical shelf space limitations.
Keep in mind that some items sold on Costco.com may require a Costco membership to purchase, while others are available to non-members through Costco’s online marketplace. Always double-check the listing before you buy.
When Costco does carry mason jars, you’ll typically find trusted names like Ball, Kerr, and Bernardin — three of the most recognized brands in home canning and food preservation. These brands are known for producing durable, reliable canning jars that work well for pressure canning, water bath canning, and simple food storage.
Buying a known brand like Ball or Kerr gives you peace of mind that your jars will seal properly and hold up over time, whether you’re preserving fresh produce or storing dry goods in the pantry.
One of the biggest draws of shopping for a mason jar at Costco is the price. Let’s look at how Costco’s approach to bulk pricing compares to standard retail, and what you actually get in the box.
Costco is known for selling in bulk at a lower per-unit cost, and mason jars are no exception. Buying a mason jar multi-pack at Costco generally works out cheaper per jar than picking up a smaller pack at a standard grocery or hardware store.
That said, exact pricing can vary by location, time of year, and current supply costs. If you’re serious about stretching your budget, it’s worth comparing the per-jar price at Costco against other retailers before you commit to a bulk purchase.
Costco’s mason jar selection typically includes a mix of sizes to suit different canning and storage needs:
Think about what you’ll actually be using your mason jar for before choosing a size. If you’re canning whole vegetables, wide mouth jars will save you a headache. If you’re making jam, regular mouth pint jars are often the traditional go-to.
A standard mason jar pack at Costco usually includes the glass jar itself, a flat lid, and a screw band (sometimes called a ring). The lid creates the airtight seal needed for safe canning, while the band holds the lid in place during processing.
If you’re new to canning, it helps to know that the flat lids are generally single-use for pressure or water bath canning, while the bands and jars can be reused many times over.
If you’ve ever shown up to your local warehouse only to find an empty shelf where mason jars should be, you’re not alone. Here’s why that happens.
Seasonal Demand: Peak Summer and Fall Canning Season
Canning season naturally drives a spike in mason jar demand. As home preservers rush to can tomatoes, peaches, pickles, and other seasonal produce, warehouse shelves can empty out fast.
Supply Chain and Local Inventory Variance
Costco warehouses don’t always carry identical inventory. Local demand, regional suppliers, and shipment timing can all affect whether your specific warehouse has mason jars in stock on any given day.
High Demand for Bulk Home Preserving
Because Costco sells in bulk, a single shopper buying a large quantity for a canning project can clear out available stock quickly, especially in smaller warehouse locations.
If your local Costco doesn’t have what you need, don’t worry. Plenty of other retailers carry mason jars, canning jars, and other glass storage jars for your kitchen.
Amazon: Fast Shipping and a Wide Variety of Multi-Packs
Amazon offers one of the widest selections of mason jar multi-packs online, often with fast shipping options. You’ll find everything from classic Ball mason jars to specialty brands offering airtight jars and reusable glass jars in different sizes.
Walmart and Target: Reliable Year-Round Local Stock
Unlike Costco’s seasonal approach, Walmart and Target tend to carry mason jars and canning jars year-round. This makes them a solid go-to if you need jars outside of peak canning season.
Hardware Stores: Ace Hardware and Tractor Supply
Hardware and farm supply stores like Ace Hardware and Tractor Supply often stock mason jars alongside other canning and preserving supplies, especially during the warmer months when home canning picks up.
Restaurant Supply Stores for Commercial Bulk
If you need a serious bulk quantity of mason jars for a business, restaurant, or large-scale preserving project, a restaurant supply store can be a smart option. These stores typically cater to high-volume buyers and may offer better pricing on large orders.
Before you stock up, keep these tips in mind to make sure you’re getting the best value and the safest jars for your project.
Inspecting for Cracks and Rim Defects Before Purchase
Always inspect each mason jar for cracks, chips, or rim defects before use. Even a tiny chip on the rim can prevent a proper seal, which matters a lot if you’re using the jar for pressure canning or water bath canning.
Buying Replacement Lids vs. Reusing Existing Rings
Canning lids are generally designed for one-time use to guarantee a proper seal, while metal bands and the glass jar itself can be reused many times. If you’re a frequent canner, it often makes sense to buy replacement lids in bulk rather than purchasing an entirely new jar set each time.
Determining if Free Shipping Outweighs Warehouse Discounts
If you’re torn between buying mason jars online or in-store, think about the full cost. A Costco in-warehouse discount might beat an online price, but if gas, travel time, or an out-of-stock shelf gets in the way, free shipping from an online retailer might save you more hassle overall.
Costco can be a great source for affordable mason jars, especially during peak canning season when bulk pricing works in your favor. But because stock isn’t guaranteed year-round, it pays to have a backup plan.
Whether you check Costco.com, head to Walmart or Target, or browse Amazon for a wide mouth jar multi-pack, there are plenty of ways to keep your pantry stocked with reliable canning jars and food storage containers. Before your next canning project, take stock of what sizes and quantities you need, then compare a few retailers to find the best deal on your mason jar supply.
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Costco’s lid availability can vary by location and season. Some warehouses may carry replacement lids separately, especially during peak canning months, but it’s best to check with your local store or Costco.com directly.
Mason jars sold under trusted brands like Ball, Kerr, and Bernardin are generally designed to be safe for pressure canning when used according to the manufacturer’s instructions. Always inspect your jars for cracks or rim defects before each use.
Costco typically stocks mason jars during peak canning season, which runs from late summer through fall. Exact timing can vary by warehouse location.
Costco Business Center locations may carry mason jars in larger case quantities geared toward commercial buyers, though availability can vary. It’s worth calling ahead if you need a bulk commercial order.
Some items on Costco.com are available to non-members through the site’s open marketplace, though certain products may require an active membership. Check the specific product listing to confirm before you buy.
