Main Menu

Halloween Onesies

1 - 60 of 76

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
Main Content
The Grinch Adult Onesie Costume UPD
Made By Us Exclusive
Adult Cheshire Cat Onesie
Made By Us Exclusive
$59.99-$64.99
Adult Dr Seuss Thing 1 2 Costume Onesie
Made By Us Exclusive
Adults Garfield Onesie Costume
Made By Us Exclusive
Adult Funny Bunny Onesie
Made By Us Exclusive
Adult Cthulhu Kigurumi Costume1
Adult Black Cat Onesie
Made By Us Exclusive
Snowy Owl Pajama Costume
$59.99
Adult Blob Fish Costume
Sale - 17% Made By Us
$59.99$49.99-$59.99*
Adult Frog Onesie Costume
Made By Us Exclusive
Adult Ludo Union Suit Labyrinth Costume
Made By Us Exclusive
Adult Ghostbusters Slimer Costume Onesie
Made By Us Exclusive
Adult Fox Kigurumi Main
$64.99
Up to 31% off – See low price in cart
Yellow Duck Onesie for Adults
Made By Us Exclusive
Adult Gremlins Gizmo Costume
Made By Us Exclusive
Adult Narwhal Onesie Costume
Made By Us Exclusive
Adult Shark Onesie
Made By Us Exclusive
$59.99
101 Dalmatians Perdita Costume Onesie for Women-2
Video
Made By Us Exclusive
Adult Sloth Onesie
Made By Us Exclusive
Adult 101 Dalmatians Pongo Costume Onesie-2
Video
Made By Us Exclusive
Brown Bear Plus Size Onesie
Made By Us Exclusive
Adult Giraffe Onesie
Made By Us Exclusive
$69.99-$84.99
Adult Panda Onesie Costume
Made By Us Exclusive
Brown Bear Adult Onesie
Made By Us Exclusive
Adult Stay Puft Marshmallow Man Costume Onesie
Made By Us Exclusive
Sesame Street Elmo Onesie Costume
Made By Us Exclusive
Adult Onesies Hooded Skeleton
Coming Soon
Pokemon Psyduck Adult Kigurumi
Coming Soon
Adult Pajama Penguin Costume
Coming Soon
Made By Us Exclusive
Adult Oscar the Grouch Costume Onesie
Coming Soon
Made By Us Exclusive
Grinch Costume Onesie for Adults
Coming Soon
Made By Us Exclusive
Adult Disney Oogie Boogie Costume Onesie
Coming Soon
Made By Us Exclusive
Adult Bedtime Bear Care Bears Costume Onesie
Coming Soon
Made By Us Exclusive
Adult Share Bear Care Bears Costume Onesie
Coming Soon
Made By Us Exclusive
Adult Tenderheart Bear Care Bears Costume Onesie
Coming Soon
Made By Us Exclusive
Adult Funshine Bear Care Bears Costume Onesie
Coming Soon
Made By Us Exclusive
Adult Good Luck Bear Care Bears Costume Onesie
Coming Soon
Made By Us Exclusive
Adult Disney Jack Skellington Onesie Costume
Coming Soon
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