Best Large Cat Litter Boxes for Multi-Cat and Big-Cat Homes (2026)
You order a litter box labeled “extra large,” unpack it, pour in the litter, and feel pretty good about your choice.
Then your 17-pound cat steps inside.
His front paws fit. His back paws fit. His rear end, unfortunately, has decided to remain in another ZIP code.
That is the problem with shopping for a large cat litter box: “XL” and “jumbo” are marketing labels, not standardized measurements. A box can look enormous online while tapered walls, a hood, or attached storage quietly remove much of the space your cat can actually use.
Our Large Cat Litter Box Picks for 2026
| Pick | Best For | Published Size | Main Trade-Off |
|---|---|---|---|
| PetSafe Multi-Cat Litter Box | Best Overall for Multi-Cat Homes | Interior approx. 21.5 × 17 × 7.5 in | Storage section adds to total footprint |
| Petmate Giant Litter Box | Best Open Box for Large Cats | 25.56 × 18.3 × 10.02 in overall | Still may be short for exceptionally long cats |
| Frisco High Sided XL | Best Simple High-Sided Value | 24 × 18 × 10 in overall | Tapered base reduces usable floor space |
| Petfamily Extra Large Hooded Box | Best Roomy Covered Option | 24.8 × 20 × 16.5 in overall | Interior floor dimensions are less clearly published |
| Modkat XL | Best Premium Covered Design | 21 × 16.5 × 17 in overall | Premium design but smaller floor than the largest open pans |
Availability varies by retailer and country. In particular, the Frisco High Sided XL is currently listed as discontinued by Chewy Canada, although U.S. availability may differ.
Before You Buy: Measure the Cat, Not the “XL” Label
A large-cat litter box should fit the cat who will actually use it.
A commonly used feline-care guideline is to look for a rectangular box roughly 1.5 times the cat’s body length from nose to the base of the tail. That gives the cat more room to enter, turn, position, dig, and cover waste without constantly pressing against the walls.
Before buying:
- Measure your cat from nose to the base of the tail.
- Compare that measurement with usable interior space, not just the widest exterior dimension.
- Check the entry height if your cat is older or has reduced mobility.
- Decide whether high walls are actually needed for litter scatter or high urination.
- Consider your cat’s existing open-versus-covered preference before paying for a hood.
How We Chose These Litter Boxes
This is a research-based buying guide. We did not perform hands-on testing of these products, so we do not claim measurements or performance observations that manufacturers and retailers do not publish.
We prioritized:
- Usable space rather than “large” marketing labels
- Entry accessibility for different ages and mobility levels
- Wall height for litter scatter and high urination
- Open versus covered fit
- Ease of scooping and cleaning
- Multi-cat practicality
- Value relative to the features provided
1. PetSafe Multi-Cat Litter Box — Best Overall for Multi-Cat Homes
The PetSafe Multi-Cat Litter Box is our overall pick for households that want a roomy open box combined with a more organized scooping setup.
Current listings include an oversized metal scoop and an attached waste-storage compartment. Retailer-published interior measurements are approximately 21.5 inches long, 17 inches wide, and 7.5 inches high.
That width is useful for cats that need room to reposition, while the open design avoids the headroom and doorway limitations of a hood.
- Best for: Multi-cat households, frequent scoopers, and cats that prefer an open box.
- Pros: Generous width, integrated scoop/waste storage, simple open access, convenient cleaning setup.
- Cons: The storage compartment makes the complete unit bulky, and exceptionally long cats may still need more interior length.
- Value: Strongest when you actually use the integrated cleanup features rather than buying it purely for size.
Who should skip it? If maximum uninterrupted floor length is your only priority, the Petmate Giant or a larger nontraditional pan may be a better fit.
2. Petmate Giant Litter Box — Best Open Box for Large Cats
If your main problem is simply fitting a big cat into the box, the Petmate Giant is the most straightforward option here.
Petmate currently lists it at approximately 25.56 × 18.3 × 10.02 inches overall. It has high sides, an open top, and a sloped front entry.
Retailer information has also placed the usable interior around 22.5 × 15.5 inches at one measured level, which is why checking interior rather than rim dimensions matters.
- Best for: Long-bodied cats, cats that dislike hoods, and enthusiastic diggers.
- Pros: One of the longer widely available open pans, high sides, uncomplicated shape, easy access for scooping.
- Cons: The front entry is still relatively high for some mobility-limited cats, and exceptionally long cats can still outgrow it.
- Value: Strong if floor space matters more than premium features or appearance.
Who should skip it? A senior or arthritic cat that struggles with the entrance may need a similarly spacious box with a genuinely lower entry.
3. Frisco High Sided Cat Litter Box, Extra Large — Best Simple High-Sided Value
The Frisco High Sided Extra Large makes sense when your cat needs more wall height but you do not want to pay for a complicated enclosure.
Its published overall dimensions are approximately 24 × 18 × 10 inches, with a lower front entrance.
The important number is underneath: the tapered bottom measures only about 19.75 × 12.875 inches.
That is a substantial difference from the dimensions printed around the outer rim.
- Best for: Average-to-large cats that kick litter over low pans and owners who need several simple boxes.
- Pros: High sides, lower front opening, straightforward cleaning, uncomplicated open design.
- Cons: Tapering sharply reduces floor space; not our first choice for a very large or long-bodied cat.
- Value: Good when you need high sides more than maximum interior length.
Who should skip it? If your cat already looks cramped in ordinary “large” pans, the smaller bottom footprint defeats much of the advantage of the 24-inch exterior length.
4. Petfamily Extra Large Hooded Litter Box — Best Roomy Covered Option
For cats that already use covered litter boxes comfortably, the Petfamily Extra Large Hooded Litter Box offers one of the larger covered footprints in this group.
Current retailer specifications list it at approximately 24.8 × 20 × 16.5 inches assembled, with an opening around 8.2 × 7.8 inches and a removable clear upper cover.
The important limitation is that those are exterior dimensions. We could not verify equally clear usable floor measurements, so a very large cat should not be matched to this box from the 24.8-inch number alone.
- Best for: Cats that already accept covered boxes and homes where scatter containment is a priority.
- Pros: Large published exterior footprint, removable hood, wide doorway, tall enclosure.
- Cons: Less certainty about usable interior floor size, and a hood can make a box feel more confined if the cat already dislikes covered designs.
- Value: Most compelling when you specifically want a roomy hooded box rather than simply the biggest floor.
Who should skip it? If your cat has previously avoided covered boxes, do not buy a hood simply because it looks tidier in the room.
5. Modkat XL — Best Premium Covered Design
The Modkat XL targets a different buyer.
Instead of maximizing raw floor length, it combines a high seamless base, covered design, reusable liners, and configurable front or top entry.
Modkat currently lists the box at approximately 21 × 16.5 × 17 inches. The front opening is about 8.3 × 9.8 inches, with its lower edge roughly 6.25 inches above the floor.
- Best for: Cats that fit comfortably inside and already tolerate covered boxes; owners prioritizing tracking control, side-urination containment, and appearance.
- Pros: Front or top entry, high seamless base, reusable liners, integrated walk-off platform.
- Cons: Smaller floor footprint than the largest open boxes, premium price, and top entry is poorly suited to many mobility-limited cats.
- Value: You are paying for the enclosure system and design—not maximum interior length.
Who should skip it? If you have an exceptionally large Maine Coon or floor space is your first priority, spend the budget on a larger usable rectangle rather than premium features.
What If Commercial “XL” Boxes Are Still Too Small?
For an exceptionally long cat, the best litter box may not be sold in the litter-box aisle.
Large storage containers, sturdy under-bed bins, or appropriately sized mixing trays can sometimes provide more uninterrupted floor space than commercial products labeled “jumbo.”
If you use a nontraditional container, choose smooth, sturdy material, make sure it stays stable when filled, and create a safe low entrance if your cat needs one.
Large Boxes in Multi-Cat Homes
A product described as “multi-cat” can be useful in a home with several cats, but it does not mean every cat should depend on one shared box.
For the full guidance on box numbers, distribution, placement, and cleaning, see our guide to how many litter boxes cats need.
If a new cat is still learning the home’s layout, our room-by-room guide for bringing a new cat home covers setting up the starting space.
Entry Height and Covered vs. Open Design
High walls can help with litter scatter and high urination, but they should not make the box difficult to enter. Older cats and cats with painful or reduced mobility may need a much lower entrance even when the rest of the box has high sides.
If you are setting up the broader home environment for the first time, our first-time cat owner guide covers the other basics.
There is also no need to settle the entire open-versus-covered debate inside this buying guide. Some cats use covered boxes willingly while others strongly prefer open access. Our covered vs. uncovered litter box guide looks at that choice in detail.
Which Large Cat Litter Box Should You Buy?
Choose the PetSafe Multi-Cat Litter Box if you want a roomy open box with useful cleanup storage for a busy multi-cat household.
Choose the Petmate Giant if usable open floor space for a large cat is your main priority.
Choose the Frisco High Sided XL if you mainly need tall walls and simple value—but make sure your cat fits its much smaller tapered base.
Choose the Petfamily Extra Large Hooded if your cat already accepts covered boxes and you want a larger enclosed option.
Choose the Modkat XL if you value enclosure design, tracking control, and flexible entry more than maximum floor length.
But the most important buying rule is simpler than the rankings.
If your cat cannot enter fully, turn comfortably, and position without crowding, the box is not large enough—no matter what the product name says.
One Health Warning Before You Blame the Box
A better litter box can solve a fit or access problem, but it cannot fix a medical one.
If your cat suddenly strains repeatedly, cries in the box, makes frequent unproductive trips, or produces little or no urine, seek veterinary help rather than assuming the new box is the problem.
Inability to urinate can be life-threatening. Our cat urinary blockage emergency guide explains the warning signs and why urgent care matters.
