6 Best Biggest Cat Litter Box Options for Big Cats and Multi-Cat Homes

By Emily Parker

Updated November 2026

Shopping for the biggest cat litter box usually comes down to one question: will my cat actually fit, turn around, and dig without kicking litter over the sides? Large cats such as Maine Coons, multi-cat households, and cats with mobility issues all need more floor space than a standard box provides. The picks below were compared on interior dimensions as stated by the manufacturers, wall height, leak protection, ease of cleaning, and the feedback patterns owners commonly report.

Our Top Picks

Quick Comparison

Metal Litter Box with High Sides for Big Cats & Multiple Cats

Metal Litter Box with Hight Sides for Big Cats& Multiple Cats,Never Absorbs Odors, Anti-Urine Leakage, Easy Cleaning Stainless Steel Litter Box , 28"L*20"W*12"H XXL Extra Large Litter Boxes

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Best for: Big cats and multiple cats who need a durable, open-top box with high walls.

This stainless steel model suits owners who want a no-frills, easy-to-sanitize basin large enough for a heavy cat to stand and dig comfortably. The open top makes it simple for cats to enter and for owners to check the box at a glance.

Key specs

• Listed size: 28″ L x 20″ W x 12″ H
• Material: stainless steel
• Open-top design with high sides

Pros

• Stainless steel resists odor absorption better than plastic, according to common owner reports
• Generous floor footprint for big cats
• Easy to wipe down and disinfect

Cons

• Open top may allow litter scatter from energetic diggers
• Metal can be noisy when scooped if the cat digs aggressively

Bottom line: A strong choice for owners of one or two large cats who want a simple, durable metal box with generous sides.

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IRIS USA XX-Large High Sided Cat Litter Box

Huge 30" x 20" x 14", Multi-Cat Use, Jumbo Capacity Pan, Extended Length Design, Oversized Basin, Multiple Cat Ready IRIS USA XX-Large High Sided Cat Litter Box, Scatter Shield, Black

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Best for: Multi-cat homes that need a jumbo pan with a scatter shield.

IRIS USA is a well-known name in pet storage and litter products, and this model is designed around multi-cat use. The extended length and deep basin give several cats room to share the box without crowding.

Key specs

• Listed size: 30″ x 20″ x 14″
• Extended length design with oversized basin
• Includes a scatter shield

Pros

• Large footprint suits multi-cat households
• Scatter shield helps contain kicked litter
• High walls reduce litter escaping during vigorous digging

Cons

• Large footprint needs dedicated floor space
• Heavier than smaller plastic boxes when full

Bottom line: The best fit for households with three or more cats sharing one or two boxes.

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XXL Stainless Steel Litter Box with Lid

Premium ABS Material Lid, High Sided, Anti Urine-leakage, Non-Stick Bottom, Easy-Clean Includes Litter Mat & Scoop XXL Stainless Steel Litter Box with Lid for Multiple & Big Cats

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Best for: Owners who want an enclosed box that limits odor and litter tracking.

This enclosed stainless steel model adds a lid and a litter mat, which suits households where the box sits in a visible living area. Cats that prefer privacy often use covered boxes more readily, though individual preferences vary.

Key specs

• Enclosed design with ABS lid
• Includes litter mat and scoop
• Stainless steel base with non-stick bottom

Pros

• Lid helps reduce litter scatter and odor spread
• Litter mat catches tracked litter
• Non-stick base makes cleanup easier

Cons

• Some cats dislike enclosed spaces and may need an adjustment period
• Lid requires regular cleaning to prevent buildup

Bottom line: Ideal for owners who want a tidier look and better odor containment for one or more large cats.

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Catlike Upgrade XXXL Stainless Steel Cat Litter Box

Oversized Real 152L Capacity Enclosed Design w/ Charcoal Filter for Maine Coon & Multi-Cat Homes, with Metal Scoop & XL Mat Catlike Upgrade XXXL Stainless Steel Cat Litter Box 3-Layer Leak-Proof

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Best for: Maine Coons, giant breeds, and multi-cat homes needing maximum capacity.

This is the largest enclosed model in this roundup by listed capacity. Its three-layer leak-proof construction and charcoal filter are aimed at owners dealing with heavy use and strong odors.

Key specs

• Listed capacity: 152 L
• Enclosed design with charcoal filter
• Includes metal scoop and XL mat

Pros

• Very large interior suits giant breeds
• Charcoal filter targets odor at the source
• Three-layer design aims to reduce leaks

Cons

• Bulky footprint may not fit small rooms
• Heavier to move when cleaning

Bottom line: The top choice for Maine Coon owners or homes with several large cats and a dedicated space for the box.

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XXXL Extra Large Stainless Steel Litter Box

XXXL Extra Large Stainless Steel Litter Box, 28" L x 20" W x 14" H Super Large Stainless Steel Litter Box, Suitable for Large Cats and Multiple Cats, Non-Sticky, Anti-Leakage, Easy to Clean

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Best for: Large cats where simple, fast cleanup matters most.

This open stainless steel box keeps the design straightforward. Owners often choose this type for quick scooping and easy wipe-downs, without the added bulk of a lid.

Key specs

• Listed size: 28″ L x 20″ W x 14″ H
• Stainless steel with non-stick finish
• Designed for large and multiple cats

Pros

• Deeper 14″ wall height than many competitors
• Easy to clean and sanitize
• Open access makes it easy for cats to enter

Cons

• No lid, so odor containment depends on ventilation and frequent scooping
• Open design can scatter litter

Bottom line: A practical pick for owners of large cats who prioritize cleaning ease over privacy.

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XXL Stainless Steel Litter Box with Lid and Footboard

XXL Stainless Steel Litter Box with Lid, 28" Lx20 W Extra Large Cat Litter Boxes for Big Cats, Jumbo Metal Litter Box with Footboard & Scoop,Anti-Leakage,Non-Sticky,Odorless,Easy to Clean

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Best for: Senior cats or cats with mobility issues who need easy entry.

The built-in footboard gives cats a step up into the box, which can help older or arthritic cats. The lid and scoop round out a package aimed at comfortable, low-effort use.

Key specs

• Listed size: 28″ L x 20″ W
• Footboard for easier entry
• Lid and scoop included

Pros

• Footboard eases entry for older or stiff cats
• Lid helps contain litter
• Non-stick and odor-resistant surface simplifies cleaning

Cons

• Footboard adds to the overall footprint
• Lid must be removed for thorough cleaning

Bottom line: The best choice when a large cat has joint problems or needs an easy step into the box.

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Buying Guide

Interior Size and Floor Footprint

A cat should be able to turn around fully and dig without its back end hanging over the edge. A common rule of thumb is that the box should be at least one and a half times the length of your cat from nose to base of tail, though larger is generally better for big breeds. Measure your cat and compare against the listed interior dimensions, not the outside.

Good picks for this: Metal Litter Box with High Sides for Big Cats & Multiple Cats; IRIS USA XX-Large High Sided Cat Litter Box

Wall Height and Litter Containment

Tall walls reduce litter kicked onto the floor, especially for vigorous diggers. Look for sides at least 12 inches high for large cats. Taller walls can make entry harder for senior cats, so balance containment against accessibility.

Good picks for this: IRIS USA XX-Large High Sided Cat Litter Box; XXXL Extra Large Stainless Steel Litter Box

Open Versus Covered Design

Open boxes are easier to check and clean, while covered boxes offer privacy and can limit odor spread. Some cats avoid enclosed boxes, so if you switch to a covered model, introduce it gradually and keep the old box nearby for a few weeks.

Good picks for this: XXL Stainless Steel Litter Box with Lid; Catlike Upgrade XXXL Stainless Steel Cat Litter Box

Material and Durability

Stainless steel is widely used for large litter boxes because it resists odor absorption and holds up to repeated cleaning. Plastic is lighter but can retain odor and scratch over time. Check whether the base is non-stick and whether the lid, if present, is removable for washing.

Good picks for this: Metal Litter Box with High Sides for Big Cats & Multiple Cats; XXXL Extra Large Stainless Steel Litter Box

Entry Access and Footboards

For older cats, cats with arthritis, or kittens still learning to climb, a low entry or footboard makes a real difference. A footboard should be stable and non-slip. Avoid boxes where the lip is so high that a cat has to jump in.

Good picks for this: XXL Stainless Steel Litter Box with Lid and Footboard; XXXL Extra Large Stainless Steel Litter Box

Capacity for Multiple Cats

A general guideline often cited by veterinary behavior resources is one box per cat plus one extra. If you have more than one cat, a single jumbo box may still be less effective than two smaller ones placed in different areas. A large box works well for multi-cat homes only when cats are comfortable sharing.

Good picks for this: IRIS USA XX-Large High Sided Cat Litter Box; Catlike Upgrade XXXL Stainless Steel Cat Litter Box

Cleaning and Maintenance

Choose a box you can scoop, wipe, and disinfect easily. Non-stick surfaces and removable lids reduce scrubbing time. Plan to fully empty and wash the box regularly, and avoid harsh chemicals that linger and can deter cats.

Good picks for this: XXXL Extra Large Stainless Steel Litter Box; XXL Stainless Steel Litter Box with Lid

FAQ

How big should the biggest cat litter box be for a Maine Coon?

Maine Coons often measure 15 to 20 pounds or more and can be longer than average from nose to tail. Look for an interior of at least 28 inches in length and enough wall height to contain digging. Extra-large or XXL-labeled boxes are typically aimed at this need.

Is a bigger litter box always better?

Bigger usually helps, but only if the cat can still enter easily and the box fits your space. An oversized box that is hard to climb into can discourage use, especially for older cats.

How many litter boxes do I need for multiple cats?

A common recommendation is one box per cat plus one additional box. Placing boxes in different areas of the home can reduce territorial conflicts. A jumbo box can serve as one of those boxes but usually should not replace all of them.

Are stainless steel litter boxes better than plastic?

Stainless steel is often preferred because it resists odor absorption and withstands frequent cleaning with disinfectants. Plastic is lighter and less expensive to replace, but it may hold odor and scratch over time. Both can work well with consistent cleaning.

Do covered litter boxes help with odor?

A lid can help contain odor and litter scatter, but it also traps smells inside if the box is not cleaned often. Pair any covered box with a regular scooping schedule and good ventilation.

What if my cat refuses to use a new large box?

Keep the old box in place for a few weeks and move the new one beside it, gradually shifting it into position. Use the same litter type and check for any health issues. If the avoidance continues, a veterinarian should evaluate the cat, since litter box avoidance can signal a medical problem.

For related troubleshooting, see Why Cats Stop Using the Litter Box and How to Respond and Cat Pooping Outside Litter Box Behavior: 7 Causes and Fixes.

Should I choose a jumbo box with a footboard?

If your cat is older or has joint pain, a footboard can make entry much easier. If your cat is young and agile, a footboard is less important than wall height and floor space.

Conclusion

The right biggest cat litter box depends on your cat’s size, your household, and how you plan to clean. For most owners of one or two large cats, the Metal Litter Box with High Sides offers a durable, straightforward option. Multi-cat homes will likely benefit most from the IRIS USA XX-Large model with its scatter shield. Owners who want privacy and odor containment should look at the lidded XXL stainless steel options, while Maine Coon households will find the most capacity in the Catlike Upgrade XXXL. Senior cats do well with the footboard model. For more help choosing litter and accessories, see How to Choose Cat Litter and a Litter Box and 7 Best Largest Cat Litter Box Picks for Big Cats and Multi-Cat Homes.

Sources

• Guidelines on feline environmental needs and litter box recommendations from a veterinary professional association
• Feline behavior and litter box resources from a university veterinary program (cornell.edu)
• Position and educational information on companion animal care from a veterinary professional association (avma.org)

Related reading

• Wood Pellets Cat Litter Box Picks: 6 Best Options for 2026
• Top Entrance Cat Litter Box: 5 Best Picks Compared (2026)

About Emily Parker

Emily Parker is part of our editorial team and reviews and edits our cats guides, checking product details against manufacturer specifications and owner feedback.