Best Samsung Galaxy S21 Ultra cases

best samsung galaxy s21 ultra cases
(Image credit: Imluckies)

If you've still got a Galaxy S21 Ultra — or picked up the phone as a hand-me-down — you better plan on adding one of the best Samsung Galaxy S21 Ultra cases as well. The top cases add a level of protection to your device, so that this older phone can remain in prime shape even longer.

Samsung may have moved on to other phones — most recently, the Galaxy S24 Ultra. But case makers continue to offer Galaxy S21 Ultra accessories, with some of the case options really standing out from the crowd. These cases deliver the best in both looks and protection, with a few baking in some extra features that make the S21 Ultra even more versatile.

We've done the legwork to find cases designed to fit the Galaxy S21 Ultra. (For other models from the S21 lineup, check out our picks for best Galaxy S21 cases and best Galaxy S21 Plus cases.) These are our recommendations for the best Samsung Galaxy s21 Ultra cases for anyone looking to extend the life of their phone.

 The best Galaxy S21 Ultra cases you can buy 

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Otterbox Galaxy S21 Ultra Defender Series Pro Case

(Image credit: Otterbox)

1. Otterbox Galaxy S21 Ultra Defender Series Pro Case

Ultimate Galaxy S21 Ultra protection


Size: 7.13 x 3.72 x 1.36 inches
Weight: 7.2 ounces
Colors: Black, Varsity Blues, Berry Potion Pink
Materials: Polycarbonate, synthetic rubber

The Defender Series Pro from Otterbox has long been the go-to for ultimate protection, and now that the Galaxy S21 Ultra is a few years old, the price has dropped to less than $30. But the quality remains intact — the Defender Series Pro is built to last, with extensive drop protection and construction that’s meant to keep your Galaxy S21 Ultra from harm. Otterbox's case has raised edges to protect the screen and camera hump.

Another nifty feature with this case is that Otterbox used a silver-based antimicrobial additive to help combat some of the most common pathogens from living on your phone case. That’s a nice peace of mind these days.

You get a holster which can double as a kickstand for watching videos or playing games. The case also works with Qi wireless charging if you’re going for that cord-free lifestyle.

galaxy s21 ultra leather case

(Image credit: Samsung)

2. Samsung Galaxy S21 Ultra Leather Cover

Suave protection for your beautiful phone


Size: 6.65 x 3.17 x 0.53 inches
Weight: 1.06 ounces
Colors: Black, Brown
Materials: Leather

If you want to keep your Galaxy S21 Ultra looking incredible while protecting it from bumps and scrapes, then we suggest checking out Samsung’s official leather case for the phone. Previous Samsung cases have been really good options, but this time around, the company added a bit more flair to make things pop.

There’s this braided texturing on the camera hump that really makes the back interesting. If you haven’t tried out leather cases yet, then we highly recommend you start by giving this one a try. The back feels smooth, but offers a lot of grip as leather usually does. 

The Galaxy S21 Ultra Leather Cover was once pretty pricey, though now it's available for less than $30. It’s also a slimmer option, so it won’t add a ton of bulk to your phone.

Samsung Galaxy S21 Ultra Silicone Cover with S Pen

(Image credit: Samsung)

3. Samsung Galaxy S21 Ultra Silicone Cover with S Pen

A must-have for S Pen owners


Size: 6.65 x 3.31 x 0.52 inches
Weight: 1.55 ounces
Colors: Black
Materials: Silicone

While more recent Ultra models comes with an included S Pen, that wasn't the case with the Galaxy S21 Ultra. So Samsung offers a case specifically designed to hold the stylus in the form of the Silicone Cover with S Pen comes in.

Not only is a good case for your Galaxy S21 Ultra in its own right, but it features a convenient little slot for the S Pen so you don’t have to worry about losing your stylus. It’s really a win-win situation here and we highly recommend this case if you're planning to add this optional accessory.

Spigen Thin Fit

(Image credit: Spigen)

4. Spigen Thin Fit for Galaxy S21 Ultra

The no-frills Galaxy S21 Ultra option


Size: 6.63 x 3.10 x 0.42 inches
Weight: 1 ounce
Colors: Black
Materials: Polycarbonate

For years, Spigen has been a notable name in the case game. For the Galaxy S21 Ultra, the company rolled out its most popular product lines, starting with the Spigen Thin Fit. Ideal for someone who wants to minimize bulk, this case is super slim like Samsung's Leather Cover. Spigen's offering uses polycarbonate instead of leather, but it's still a nice-feeling case.

Spigen's Thin Fit adds bump protection and keeps the back glass of the Galaxy S21 Ultra from getting scratched, all while appealing to the minimalist in all of us. Don't expect the kind of protection you'd get from a more elaborate case, but the Thin Fit is a very affordable option.

Spigen Tough Armor

(Image credit: Spigen)

5. Spigen Tough Armor for Galaxy S21 Ultra

Another good rugged option


Size: 6.74 x 3.22 x 0.49 inches
Weight: 2 ounces
Colors: Black, Gunmetal
Materials: Polycarbonate, TPU

The second Spigen option among the best Galaxy S21 Ultra cases is the Tough Armor. This is for people who want the best protection that Spigen has to offer, and want that peace of mind in case of phone drops or bumps. This S21 Ultra case is really durable and built to last.

The Tough Armor packs in shock-absorbing impact foam all while keeping as slim of a profile as possible to make sure that you’re not left stuck holding a brick. You get excellent grip along the sides, too, so it’s going to be really hard to drop your Galaxy S21 Ultra in this case. Oh, and the case offers a kickstand if you need it.

spigen rugged armor

(Image credit: Spigen)

6. Spigen Rugged Armor for Galaxy S21 Ultra

Another slim option for your Galaxy S21 Ultra


Size: 6.65 x 3.13 x 0.45 inches
Weight: 1.5 ounces
Colors: Black
Materials: TPU

Spigen’s other well-known case line, the Rugged Armor, also comes as an option for Galaxy S21 Ultra owners. This case is made from a flexible TPU material, which some people prefer to the hard polycarbonate shells (like the Spigen Thin Fit). This is down to personal preference, but the Rugged Armor has some nice styling to catch the eye and it protects the Galaxy S21 Ultra from scrapes and bumps.

With a case, you give up the beautiful design of your shiny new Galaxy S21 Ultra, so it’s good to have a case that looks nice in turn. The Rugged Armor features carbon fiber and glossy accents to make it pop. The flexible TPU material is also better equipped to survive damage to the case itself, better than a polycarbonate shell would be.

Incipio Grip

(Image credit: Incipio)

7. Incipio Grip for Galaxy S21 Ultra

A good grip is important


Size: 6.73 x 3.24 x 0.5 inches
Weight: 3.84 ounces
Colors: Black, Midnight Blue
Materials: Polycarbonate

Incipio is another well-known case maker with some options available for the Galaxy S21 Ultra. The one we’re looking at here is the Grip case, which focuses on providing the best grip possible. Incipio stresses that the multi-directional grip will go a long way in preventing accidental drops by making it easier to keep hold of your Galaxy S21 Ultra.

The raised edges keep the screen safe when setting the phone face down. The Grip also features shock-absorbing and antimicrobial technology built into the case itself. Best of all, the case itself is relatively slim so there's no bulk added on.

fyy luxury cases

(Image credit: FYY)

8. FYY Luxury Case for Galaxy S21 Ultra

A wallet case that actually looks good


Size: 7.36 x 4.84 x 0.91 inches
Weight: 4.6 ounces
Colors: Black, Wine Red
Materials: Leather, TPU

Wallet cases have been around for a really long time and some people swear by them. The FYY Luxury Case for the Galaxy S21 Ultra can satisfy that need. It’s made from genuine leather and features RFID-blocking technology to keep your information private.

In addition to your S21 Ultra, FYY's case can hold up to three cards and it has a pocket for cash, business cards, or other items you may need to keep. As far as folio wallet cases, this one looks excellent and will keep your Galaxy S21 Ultra looking good.

Speck presidio 2

(Image credit: Speck)

9. Speck Presidio2 Grip for Galaxy S21 Ultra

Excellent grip and protection all in one


Size: TBA
Weight: TBA
Colors: Coastal Blue/Black/Storm Blue, Grey/Black/Bold Red, Black/White
Materials: TBA

Yet another familiar case brand, Spechas a few options for your new Galaxy S21 Ultra. Our pick is the Presidio2 Grip, which, as the name implies, offers you excellent grip to keep your phone from falling out of your hands. In case your Galaxy S21 Ultra does decide to meet the floor, the Presidio2 Grip will protect it with Armor Cloud technology. That means air cushions will work hard to absorb most of the shock from impact.

Another nice feature is the antimicrobial protection, which helps protect against the vast majority of pathogens out there. It’s still no substitute for washing your hands regularly, but it’ll help prevent things from living and growing on your phone. The Presidio2 Grip comes in a few colorways with its soft-touch finish and textured grips. Those familiar with Speck’s case design will find a lot to love with this one.

Otterbox commuter series

(Image credit: Otterbox)

10. Otterbox Galaxy S21 Ultra Commuter Case

Time-tested protection and style


Size: 6.76 x 3.27 x 0.6 inches
Weight: 1.76 ounces
Colors: Black, Bespoke Way Blue
Materials: Synthetic rubber, polycarbonate

Otterbox’s tried-and-true Commuter series isn't as bulky as the Defender Pro, but it will still keep your phone safe from bumps and short drops. It also features Otterbox’s antimicrobial technology, which will help keep nasty things from living on your phone case.

The Commuter name is meant to signify that this case will provide the best protection for day-to-day use. While some may require something more rugged, this case is great for the vast majority of people out there and its popularity proves that.

Samsung Galaxy S21 Ultra Clear View cover

(Image credit: Samsung)

11. Samsung Clear View Cover

A folio case with a notification window


Size: 79.8 x 169.6 x 13.5 mm
Weight: 84 grams
Colors: Black, Light Gray
Materials: Plastic

If you're finding that you're hooked on using your new super-powered Samsung, this phone might take away that temptation by allowing you to perform basic interactions through the cover's transparent cut-out. Being able to check the time, notifications or answer calls without opening the phone completely might be what you need to stop wasting hours on other apps once you've finished what you need to do.

Beyond showing off your notifications, the case also boasts an antimicrobial coating, and a folio-style protection for the whole phone, including adding a smart-looking carbon-fiber-style cutout between your camera lenses.

Caseology Nano Pop

(Image credit: Caseology)

12. Caseology Nano Pop

A fun case with serious protection


Size: 17.7 x 9.7 x 1.4 cm
Weight: 30 grams
Colors: Blueberry Navy, Prune Charcoal
Materials: Silicone, polycarbonate

This two-tone case will help make your rather serious-looking Galaxy S21 Ultra look a little more fun. The colors are apparently inspired by fresh fruit, with the brighter of the two tones helping show off that intimidating rear camera block.

For safety features, the Nano Pop features a raised edge around all sides of the phone to keep your screen safe, and cushioned corners to avoid fall damage. It doesn't get in the way however, as it adds just 0.14 inches of thickness to keep it feeling like a normal phone. That thinness also means you can wireless charge and reverse wireless charge without needing to take off the case.

Imluckies case with camera cover for Galaxy S21 Ultra, in blue.

(Image credit: Imluckies)

13. Imluckies Case with Camera Cover

The best Galaxy S21 Ultra case if you're really protective of your rear lenses


Size: 6.72 x 3.18 x 0.55 inches
Weight: 1.54 ounces
Colors: Black, blue, green
Materials: TPU, polycarbonate

If you want to avoid scratching one of the four rear cameras of your S21 Ultra, or just want to guarantee nobody's peeping through them without your knowledge, then this case from Imluckies lets you slide a cover over them. 

The rest of the case, made of TPU and PC plastic, will do a good job of protecting the rest of your phone, and the back portion features a diagonal, fingerprint-proof pattern that looks good and enhances your grip on the phone. You also get extra padding in the corners just in case of falls, which should prevent catastrophic damage.

What is the best Galaxy S21 Ultra case with a stand?

If you'd like a kickstand to prop up your Galaxy S21 Ultra with for easy video viewing, then we recommend the Otterbox Defender Series Pro, or the Spigen Tough Armor. The Spigen case is slimmer overall, but the Otterbox case's stand doubles up as a holster as well.

What is the most protective Galaxy S21 Ultra case?

If you're prioritizing toughness, we have a number of cases to recommend. 

The Otterbox Defender Series Pro and the Spigen Tough Armor are fairly typical protective cases with chunky profiles. As alternatives, take a look at the Speck Presidio2 Grip, whose grippy sides could avoid you dropping the phone in the first place, or the FYY Luxury Case and Samsung Clear View Cover which, as folio-style cases, cover your display as well as the back and sides.

There's also the Imluckies Case with Camera Cover if you're specifically worried about protecting your rear cameras. This model features a sliding panel that can cover up the rear snappers when not in use.

What is the best leather case for Samsung Galaxy S21 Ultra?

For some, only the most luxurious materials will do for their case. If you want your S21 Ultra clad in leather, then we recommend the Samsung Leather Cover for a simple case, or the FYY Luxury Case if you prefer a folio case that comes with a front cover as well.

Jordan Palmer
Phones Editor

Jordan is the Phones Editor for Tom's Guide, covering all things phone-related. He's written about phones for over six years and plans to continue for a long while to come. He loves nothing more than relaxing in his home with a book, game, or his latest personal writing project. Jordan likes finding new things to dive into, from books and games to new mechanical keyboard switches and fun keycap sets. Outside of work, you can find him poring over open-source software and his studies.