Fancy Dress Costumes Starting with Letter O
Many dress up costume parties are organised around a theme. One very popular costume party theme is to dress up as something starting with a letter of the alphabet. Browse this fun category for all kids and adult’s fancy dress costumes starting with ‘O’.
Check out our ‘Costumes that Start with O’ blog post for more costumes starting with O! [more]
Outstanding Costumes Starting with O
Step into the mischievous world of “Where’s Wally” with the instantly recognisable Odlaw. His signature yellow and black stripes are perfect for stirring up some trouble. Or get ready to bring a burst of colour and quirky charm as an Oompa Loompa from “Willy Wonka”. With vibrant green hair and classic braces-style overalls, this costume guarantees smiles (and maybe some sweet tooth cravings).
Fancy a retro vibe? Wear an Olive Oyl costume, the timeless and adorable companion of Popeye. Her red-and-black outfit captures her spirited character perfectly. If you prefer something grouchier, take a walk on the wild side as Oscar the Grouch from “Sesame Street”.
Throw it back to ‘90s animated greatness as Otto Mann, the lovable, laid-back bus driver from “The Simpsons”. Think rock-band tees, unruly hair, and a chilled-out attitude. Or, for ultimate vintage flair, step out as Oliver from the beloved musical and give everyone a chance to ask, “Please sir, can I have some more?”
Easy and Iconic Costumes Starting with O
Step into the creepy yet charismatic world of The Nightmare Before Christmas as Oogie Boogie, the cunning and mischievous villain. With his burlap sack-inspired look and glowing bug-like charm. If you cherish the magic of family and culture, channel the beloved Oscar Rivera from Disney’s Coco.
For superhero fans, the sky’s the limit when you dress as Owlette from PJ Masks. This high-flying superhero is resourceful, brave, and always ready for action. With her signature red cape and owl-inspired mask, you can soar above the crowd while embodying her heroic, can-do spirit. Our letter O titled adult’s costumes present quite a few possibilities.
Creative Costume Ideas Starting with the Letter O
Get comfy with our costume Onesies—whether you’re a mystical Unicorn or a cheeky kangaroo, our onesies are perfect for chilled-out gatherings or all-night parties. If you’re in the mood for a Bavarian celebration, transform yourself with an Oktoberfest costume, complete with dirndls, lederhosen, and plenty of festive flair.
Feeling creative? Channel your inner professional with any Occupation costume—think doctors, firefighters, chefs, or even astronauts. Still undecided? Add a spooky twist by dressing as a Ouija Board, a guaranteed head-turner at any Halloween party!
Want an animal costume that stands out? Become the life of the party as a hilarious Octopus, complete with tentacles. Or perhaps you’d like to go down memory lane as the quintessential Old Man or Old Lady, complete with walking canes and glasses for a vintage touch.
For a powerful and heroic appearance, consider stepping into the shoes of an Officer costume—be it a sharp Police Officer or a noble military costume look to make a bold statement. Or, go for a divine energy as an Olympic Goddess, showered in gold and exuding elegance.
If you’re after something a bit cheeky, make everyone laugh as a tongue-in-cheek One Night Stand. Or indulge in some classic nostalgia by dressing as a piece from the 80s’ favourite board game Operation—complete with a buzzer for added hilarity!
Finally, for fans of the Wild West, bring out your fearless side as a daring Outlaw cowgirl or Outlaw cowboy, complete with cowboy boots, holsters, and a bandana to complete your rugged look.
Women’s costumes beginning with the letter O and men’s costumes that start with the letter O, are available in both regular and plus size costumes, all in stock and ready for super fast shipping straight to your front door!
Why choose Heaven Costumes for dress ups starting with O:
- We’re an Australian family run business, and our costume shop is located in Adelaide!
- Our costumes are made from high-quality materials, making them the perfect option for your next starts with letter costume party!
- Available in mens, womens, girls and boys sizing, giving you easy costumes that start with O for the whole family!
- Shop now for same day dispatch on all orders shipped from our Adelaide Warehouse (if order is placed prior to 4pm ACST or ACDT during Daylight Savings).
- Costumes delivered next day with Toll Priority Shipping to Metro and Major Regional Centres (Adelaide Warehouse only).
- Delivery only products have a 1-3 day shipping time with StarTrack Express from our suppliers warehouses in Sydney and Melbourne.
- Safe and secure online purchasing or come see us in-store if you’re looking for an Adelaide Costume Shop!
- Easy exchanges if your costume doesn’t fit and 14 Day hassle free returns!
- Multiple payment options including VISA or Mastercard, Paypal, Pay in Store (for collection from our Adelaide warehouse) and Buy Now Pay Later options including Afterpay, ZipPay and Klarna.
- Australia’s biggest range of costumes that start with O!
