Best Samsung Galaxy S21 Ultra cases in 2024 (2024)

Buying one of the best Samsung Galaxy S21 Ultra cases will make sure that your big, expensive phone is less likely to need big, expensive repairs. Plus it could help make your already versatile phone even more useful.

Samsung's moved on to the Galaxy S23 Ultra (and the Galaxy S22 Ultra before that), but the Galaxy S21 Ultra remains a top-quality phone, even if you're only buying it today. And a top-quality phone deserves the best in look and protection, as well as extra features that Samsung didn't add, depending on what your priorities are.

So what are the best Galaxy S21 Ultra cases to pick from? We've done the legwork and here are our picks for the best options for you, depending on what you need and/or want from a phone case.

Also, check out our Galaxy S22 Ultra vs Galaxy S21 Ultra and Galaxy S23 vs Galaxy S21 face-offs if you need to make your mind up between which of Samsung's most recent smartphone generations will suit you best.

The best Galaxy S21 Ultra cases you can buy

The Defender Series Pro from Otterbox has long been the go-to for ultimate protection, but it’s also one of the more expensive entries in this list of the best Galaxy S21 Ultra cases. That's because 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.

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 is a bit pricey, but it’s worth it for the material and design quality. It’s also a slimmer option, so it won’t add a ton of bulk to your phone.

Samsung also has a case specifically designed to hold the S Pen, a new accessory for the Galaxy S21 Ultra. Unlike the Galaxy Note series, the S21 Ultra doesn’t have a built-in slot to house the S Pen. So if you bought the $40 pen along with your new phone, then you’ll want somewhere to put it to keep it safe. That’s where the Samsung 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 it. It’s really a win-win situation here and we highly recommend this case if you're planning to add this optional accessory.

For years, Spigen has been a notable name in the case game. For the Galaxy S21 Ultra, the company is rolling out its most popular product lines. Starting things off is the Spigen Thin Fit, which is the case for someone who just wants minimal bulk. This case is super slim like Samsung's Leather Cover, but it's polycarbonate instead of leather. Even so, you get a nice-feeling case with the Thin Fit.

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.

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’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 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.

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.

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.

Rounding our look at the best Galaxy S21 Ultra cases is Otterbox’s tried-and-true Commuter series. It’s not 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.

The Caseology Parallax offers raised edges to keep your screen off a surface when you lay your phone down, and a separate plastic bumper to avoid damage from big drops. It does all this while adding just 0.16 inches to the handset, keeping your big phone as small as possible. While that's all well and good, what makes it really special is the striking rear pattern. It gives the S21 Ultra a unique look and makes it easier to hold thanks to the textured grip.

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.

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.

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.