The Galaxy S21 Ultra is one of the biggest and most powerful Galaxy phones ever. It's also the first to work with the S Pen, which has been traditionally reserved for the Note line. Given its size and heft, you need to protect your investment with a sturdy case that adds both grip and style. Here are our top picks for the best Galaxy S21 Ultra cases, whether you're after a clear case to show off the Ultra's design or a durable tank-like enclosure to keep it safe and secure.
The best Galaxy S21 Ultra cases
Caseology Nano Pop Case
Colorful and durable
After two years of the Nano Pop being exclusive to iPhones, it's finally available for Samsung devices with the S21 series. The Blueberry Navy with its yellow accents is striking and classic, while the impact-absorbing pattern embedded in the back gives you slim protection. I wish the Ultra also had the Violet shade the smaller S21s have, but these colors are still fun.
ArmadilloTek Vanguard Series
Ready to work hard
The S21 Ultra is made for productivity, so it should come as no surprise that one of my favorite S21 Ultra cases features a nice, sturdy kickstand that works in portrait mode so you can prop it up next to your computer or while doom-scrolling at the dinner table. The colors are nice, too, with the Purple and Red versions looking especially fetching.
Spigen Liquid Air P
Best case for S-Pen
The Spigen Liquid Air Armor series has been one of its most popular ever since it arrived two years ago. The S21 Ultra gets another upgrade as one of the only third-party cases with a slot for the S-Pen. It also has a better grip, doesn't get dirty too quickly, and is way more affordable. However, do remember you'll have to buy the S-Pen separately.
Samsung Galaxy S21 Ultra Leather Cover
Look at those accents!
Samsung's Leather Cover is usually one of the best leather cases for any Samsung phone period. Still, the Ultra gets some extra pomp and circumstance in the form of braided texturing on the camera module. It's like the Carbon fiber on the custom Ultra, only it actually looks good!
Ringke Onyx Series
Thin, but rugged
Ringke is one of the best case makers that gives you durability in a compact profile, and its Onyx series comes in two flavors. The regular Onyx comes in Black, Navy, and Gray shades, while the Onyx Design has some fun little quips and tech-y easter eggs in its three designs, which are all on the Black. I wish the Graffiti came with Navy, though.
OtterBox Symmetry Series
Sturdy and strong
OtterBox may be best known for its tank-like Defender Series, but I'm more fond of the Symmetry Series with its brighter colors and sleeker shapes. I mean, look at this turquoise! Samsung was too scared to give us something this bold, but at least OtterBox has the guts for it. This year's model is also made with 60% recycled materials, so it's more sustainable.
ESR Clear Case
Show it off
ESR's clear cases are as slim as a case can be, allowing you to see every millimeter of Samsung S21 Ultra's design while guarding it against scratches and adding some much-needed grip to this extra-large phone. It adds the slimmest of margins while giving you peace of mind. ESR also has bundles so that you can snag some screen protectors alongside the clear case.
Carry everything together
Folio cases let us guard that big, bright, beautiful screen while also adding extra functionality with wallet flaps to hold cards and cash. This wallet folio from Foluu has small magnetic clasps on the side, which don't get in the way when open. This wallet only has two card slots, but the cash flap is deep. Remember: your S21 Ultra has Google Pay and Samsung Pay too!
Speck Presidio 2 Grip
Grooves and grime-fighting
With its iconic and expertly grippy grooved pattern across the back, Speck's most popular case series is alive and well with the S21 Ultra. Rated to withstand 13-foot drops thanks to its Armor Cloud air cushioning, it also features added Microban protection against odor and stain-causing germs, so your case looks just as great two years from now.
Spigen Liquid Crystal Glitter
Better than clear
The Spigen Liquid Crystal comes in a few flavors this year, but if you're secure enough in your style, I highly recommend grabbing the Glitter version for two reasons: Firstly, the glitter hides smudges and scuffs, so it's more functional. Secondly, glitter adds more personality and depth to the overall look.
Samsung Silicone Cover with S-Pen
Two accessories in one
If you're going for broke with your S21 Ultra case, you might as well get something extra and extra-useful with yours. This case comes with the S-Pen, turning your S21 Ultra into a Galaxy Note in most ways. Sadly, it only comes in black, and the silicone case here attracts dust and smudges.
Tech21 Evo Check
Shockproof and secure
Tech21's cases are all impeccably designed to keep your phone secure while still showing it off, with the Evo Check being drop-tested up to 12 feet while still showing off the S21 Ultra's branding. There's also antimicrobial protection embedded in the silicone, and the Smokey/Black color makes it look even better.
Hail to the queen
Urban Armor Gear is best-known for its super-rugged cases, but the Monarch is more of a ruggedly handsome rogue. The case has five layers, including luxurious leather across the back. It always feels delightful in hand, and this year, we get a Mallard Blue in addition to Crimson Red.
Spigen Rugged Armor
If there were a TPU embodiment of "if it ain't broke, don't fix it," it would be the Spigen Rugged Armor series. You've got a slight texture across the back and sides for grip, and the extra texturing for grip near the bottom and the side of the camera module helps you hold the phone better when taking photos.
Anccer Ultra Thin
If you don't want to bulk up your Galaxy S21 Ultra any more than necessary, Anccer's thin, hard-shell will give you some added grip and scratch protection without making this super-sized phone any harder to fit in your pocket. You also get four colors to choose from
This case may not seem all that rugged, but it's got impact struts to help it (and your Galaxy S21 Ultra) survive 14-foot drops. It's also got an impressively textured bumper to help you keep your S21 Ultra in your hand instead of letting it slip through your sweaty fingers.
Grip and glamour
The shallow and mesmerizing texture on the Parallax case allows you to get a good grip bare-handed while still playing nice with PopSockets and other stick-on accessories if you need to use one with the S21 Ultra (I know my small hands need it!). You can get a Purple-ish or Pink that mimics the smaller S21.
What makes the best cases for the Galaxy 21 Ultra?
There's usually a half-dozen factors to consider and juggle when choosing a case. Still, durability and grip must be top of the list for a phone as physically large and heavy as the Galaxy S21 Ultra. Heavy-duty cases for the Galaxy S21 Ultra are bound to draw a lot of attention for higher drop-testing and extra functionality such as the kickstand on the ArmadilloTek Vanguard Series, which is durable and dependable while injecting some color. If you want protection without getting a bulky case, check out the Caseology Nano Pop, which builds air cushions into both the bumper and the back cover while also offering up dynamic two-tone colorways and a slim profile.
If you prefer thin Galaxy S21 Ultra cases or clear cases, the Anccer Ultra Thin and the ESR Clear Case both offer increased grip and scratch protection while keeping your Galaxy S21 Ultra as svelte as possible. Still, there's also a relatively slim case option for S-Pen users in the Spigen Liquid Air P. Android Central's Hayato Husemen has used it for a while and relies on it more than Samsung's S-Pen case because it doesn't attract dirt or fingerprints. And buying the Liquid Air P and S-Pen separately will still save you money compared to the Samsung S-Pen Silicone Case bundle.
While you're buying your new phone a case, though, don't neglect the screen, because if your front glass shatters, all you're left with is an expensive paperweight. The Best Galaxy S21 Ultra Screen Protectors will ensure that your touchscreen remains pristine and perfect for years to come.
Ara Wagoner was a staff writer at Android Central. She themes phones and pokes YouTube Music with a stick. When she's not writing about cases, Chromebooks, or customization, she's wandering around Walt Disney World. If you see her without headphones, RUN. You can follow her on Twitter at @arawagco.
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