Main Menu

Halloween Onesies

1 - 60 of 145

Onesies aren’t just for babies anymore—our Halloween onesies are cozy, fun, and made for everyone! From Pokémon to Winnie the Pooh to pajama-style kigurumis, we've got looks for toddlers, kids, adults, and plus sizes. Whether you're after cute or funny Halloween onesies, comfort is guaranteed. Skip the itchy costumes and shop our selection for the comfiest Halloween ever!
read moreread less
1 - 60 of 145
Main Content
Minecraft Creeper Onesie
Sale - 14%
Adult Dr Seuss Thing 1 2 Costume Onesie
Sale - 17% Made By Us
Adult's Cheer Bear Care Bear Onesie
Made By Us Exclusive
Adult Stormtrooper Deluxe Onesie Costume
Sale - 44% Exclusive
Adult Cookie Monster Zip Costume
Made By Us Exclusive
Adult Elmo Zip Costume
Made By Us Exclusive
Adult Chewbacca Deluxe Onesie Costume
Sale - 44% Exclusive
Adult's Grumpy Bear Care Bear Onesie
Made By Us Exclusive
Women's Pink Dinosaur Onesie Main
Sale - 33% Made By Us
$83.99$55.99-$111.99*
The Grinch Adult Onesie Costume upd
Sale - 20% Made By Us
Adult Funshine Bear Care Bears Costume Onesie
Sale - 17% Made By Us
Adult Cheshire Cat Onesie
Made By Us Exclusive
Brown Bear Adult Onesie
Sale - 33% Made By Us
Adult 101 Dalmatians Pongo Costume Onesie-2
Video
Sale - 33% Made By Us
Cat in the Hat Costume Onesie
Sale - 25% Made By Us
Adult Share Bear Care Bears Costume Onesie
Sale - 17% Made By Us
Adult Disney Oogie Boogie Costume Onesie
Made By Us Exclusive
Adult Pixar Sulley Costume Onesie
Sale - 20% Made By Us
Adult TMNT Raphael Costume Onesie
Sale - 43% Made By Us
Gray Shark Adult Costume
Sale - 33% Made By Us
Adult Pajama Penguin Costume
Made By Us Exclusive
Plus Size Cheshire Cat Onesie
Sale - 17% Made By Us
Adults Garfield Onesie Costume
Sale - 17% Made By Us
Chucky Good Guys Cosplay Adult Union Suit
Clearance  - 60%
Adult Stay Puft Marshmallow Man Costume Onesie
Sale - 17% Made By Us
Adult Cozy Skeleton Onesie
Sale - 50% Made By Us
Adult Good Luck Bear Care Bears Costume Onesie
Sale - 17% Made By Us
Tigger Pajama Costume
Sale - 10%
$139.99$125.99
Adult Gingerbread Man Onesie Costume
Sale - 17% Made By Us
Adult Kangaroo Onesie Costume
Sale - 22%
101 Dalmatians Perdita Costume Onesie for Women-2
Video
Sale - 42% Made By Us
Adult Santa Jumpsuit
Sale - 8%
Adult TMNT Leonardo Costume Onesie
Sale - 43% Made By Us
Plus Size 101 Dalmatians Pongo Adult Costume Onesie-2
Video
Sale - 29% Made By Us
Plus Size Disney Oogie Boogie Costume Onesie
Made By Us Exclusive
Grinch Costume Onesie for Adults
Sale - 17% Made By Us
Adult Elf Jumpsuit
Sale - 17%
Plus Size Womens Pink Dinosaur Onesie Costume
Sale - 21% Made By Us
Adult Blob Fish Costume
Sale - 60% Made By Us
$69.99$27.99-$69.99
Adult Black Cat Onesie
Sale - 20% Made By Us
$69.99$55.99-$69.99*
Adult's Comfy Shark Costume
Sale - 25% Made By Us
Sailor Moon Adult Luna Kigurumi
Sale - 10%
Adult Funny Bunny Onesie
Sale - 20% Made By Us
Adult Tenderheart Bear Care Bears Costume Onesie
Made By Us Exclusive
Adult Tiger Kigurumi
Sale - 36%
Adult Ludo Union Suit Labyrinth Costume
Made By Us Exclusive
Adult Transformers Bumblebee Union Suit
Made By Us Exclusive
Filter

Let’s be honest—babies don’t have a monopoly on being cozy and adorable. Why should the under-3 crowd get all the good onesies? We say: reclaim the zipper-front fluff life! Halloween is the perfect time to embrace your inner lounge monster, and our Halloween onesies are here to prove that comfy and costume-y can absolutely coexist. We’re on a mission to normalize adults waddling around like Pikachu in public, and frankly, we think we’re crushing it.

Our onesie lineup is like a warm hug from your favorite cartoon character. Want to be a Pokémon but also nap-ready? Boom—Pokemon onesies. Looking to channel the ultimate snack-loving bear? We've got Winnie the Pooh onesies softer than a honey-glazed dream. Prefer your Halloween look a little more "bedtime chic"? We carry pajama costume onesies that turn heads and turn in early. From spooky to silly, we’ve curated styles for every kind of Halloween vibe—and they’re all maximum comfort, minimum effort.

It doesn’t matter if you’re a toddler just learning the power of the costume, a kid ready to dominate the neighborhood candy circuit, or an adult embracing the magic of mobility and warmth—we’ve got sizes for everyone. That includes plus sizes and a great variety of kigurumis (AKA the Japanese art form of turning comfy into cosplay). You could literally throw a family Halloween party with everyone dressed in onesies, and it would be the softest, most huggable costume moment in history.

So if you're tired of wigs, tight waistbands, and peeling fake blood, it's time to zip into a cozier Halloween. With funny Halloween onesies, cute classics, and cozy critter designs galore, you'll actually want to keep your costume on all night. Shop our selection of adult Halloween onesies, kids Halloween onesies, and more—your body (and your couch) will thank you.

HalloweenCostumes.com Monster