Cartoon Characters that Start with O

99 Outstanding Cartoon Characters Starting with Letter O

In the world of cartoons, there are countless characters that have captured our hearts and imaginations. From lovable heroes to mischievous villains, these animated characters have made us laugh, cry, and everything in between. In this article, we will be exploring 25 cartoon characters that all share one thing in common – their names begin with the letter O.

Cartoon Characters that Start with O

1. Olaf ( Frozen )

First on our list is the adorable snowman from Disney’s Frozen, Olaf. With his sunny disposition and love for warm hugs, Olaf quickly became a fan favorite upon his debut in the hit animated film. He is known for his catchy songs and comical antics, making him a lovable addition to the Disney family.

2. Optimus Prime ( Transformers )

An iconic character from the popular franchise, Optimus Prime is the leader of the Autobots and protector of Earth. With his strong sense of justice and unwavering loyalty, he has become an inspiration to many fans of the Transformers series.

3. Obi-Wan Kenobi ( Star Wars: The Clone Wars )

Known for his wisdom and skill in the ways of the Force, Obi-Wan Kenobi is a legendary Jedi Knight from the Star Wars universe. He has appeared in multiple animated series, including Star Wars: The Clone Wars, where he plays a crucial role in training and guiding young Anakin Skywalker.

4. Osmosis Jones ( Osmosis Jones )

A character that combines live-action and animation, Osmosis Jones is a white blood cell who protects the body of Frank Detorre from harmful germs. With his sidekick Drix, he embarks on adventures inside Frank’s body to keep him healthy and safe.

5. Oswald the Lucky Rabbit ( Disney )

Created by Walt Disney himself, Oswald is one of the earliest cartoon characters from the Disney franchise. With his floppy ears and cute personality, he quickly became a beloved character among audiences in the 1920s.

6. Omi ( Xiaolin Showdown )

A young monk-in-training, Omi is the main protagonist in the animated series Xiaolin Showdown. With his friends, he embarks on a journey to collect mystical artifacts and protect them from falling into the wrong hands.

7. Odie ( Garfield )

The adorable yellow dog from the comic strip Garfield, Odie is known for his playful personality and unwavering loyalty to his owner, Jon Arbuckle. Despite often being the target of Garfield’s pranks, Odie remains a beloved character in the series.

8. Olive Oyl ( Popeye )

A classic character from the Popeye franchise, Olive Oyl is known for her distinctive voice and her on-and-off relationship with the muscle-bound sailor. She may not have super strength like Popeye, but she holds her own with her wit and determination.

9. Omi ( Jackie Chan Adventures )

A young girl from the animated series Jackie Chan Adventures, Omi is one of the main protagonists who helps to protect powerful magical artifacts from falling into the wrong hands. With her martial arts skills and quick thinking, she is a formidable ally in their adventures.

10. Otto Rocket ( Rocket Power )

From the Nickelodeon animated series Rocket Power, Otto is a thrill-seeking preteen who loves extreme sports and challenges. Along with his friends, he navigates through the ups and downs of growing up while pursuing their passion for various sports.

11. Orko ( He-Man and the Masters of the Universe )

A magical creature from the planet Trolla, Orko is a loyal friend and ally to He-Man in their battle against evil forces. Known for his comical misadventures and spell-casting abilities, he adds an element of humor to the series.

12. Officer Jenny ( Pokemon )

A recurring character from the beloved animated series Pokemon, Officer Jenny is a member of the Pokemon Police Force who helps to maintain peace and order in the world of Pokemon. With her trusty Growlithe by her side, she is always ready to assist our favorite trainers.

13. Olly and Ox ( Rolie Polie Olie )

The main protagonist from the animated series Rolie Polie Olie, Olly is a curious and adventurous robot who loves to explore his world with his best friend, Ox. Together, they embark on imaginative adventures while learning valuable lessons along the way.

14. Othello ( G.I. Joe )

Also known as Snake Eyes, Othello is a member of the popular animated series G.I. Joe. With his expert combat skills and fierce loyalty to his team, he is a valuable asset in their fight against the evil organization known as Cobra.

15. Orson Pig ( U.S. Acres )

From the comic strip and animated series U.S. Acres, Orson Pig is a kind-hearted pig who tries his best to keep the other animals on the farm out of trouble. Despite often being seen as the voice of reason, he sometimes gets caught up in his friends’ wild schemes.

16. Oswald ( Oswald )

A blue octopus from the animated series Oswald, this lovable character spends his days going on adventures with his friends and learning valuable life lessons along the way. With his positive attitude and kindness towards others, he is a great role model for young viewers.

17. Oruc ( Aladdin )

From the animated series based on the hit movie, Aladdin, Oruc is a genie who serves as a mentor and guide to Aladdin and his friends. With his wisdom and magical abilities, he helps them navigate through their various adventures in Agrabah.

18. Oggie ( The Houndcats )

Part of the crime-fighting team from the animated series The Houndcats, Oggie is a basset hound who uses his keen sense of smell to solve mysteries and save the day. With his trusty sidekick Tammy, he proves that even a small dog can have a big impact.

19. Om Nom ( Cut the Rope: Om Nom Stories )

A cute and mischievous character from the popular game Cut the Rope, Om Nom is a green creature who loves candy and adventures. In his animated series, he sets out on various quests to find sweets while overcoming obstacles and making new friends.

20. Omi ( Xiaolin Chronicles )

From the reboot of Xiaolin Showdown, Omi returns as a young monk who must once again protect mystical artifacts from falling into the wrong hands. With his friends by his side, he faces new challenges and villains while honing his skills in the ways of the Xiaolin.

21. Otto ( The Simpsons )

The oldest child and only son of Homer and Marge Simpson, Otto is known for his love of heavy metal music and his job as a bus driver. Despite being a bit of a slacker, he is often seen as a lovable and free-spirited character in the long-running animated series.

22. Ollie ( The Adventures of Sonic the Hedgehog )

From the classic animated series based on the popular video game franchise, Ollie is a friendly owl who often provides helpful advice and information to Sonic and his friends. Along with his partner Griff, he helps the group in their fight against the evil Dr. Robotnik.

23. Oscar ( Fish Hooks )

A self-proclaimed “cool cat” fish, Oscar is one of the main characters in the animated series Fish Hooks. With his optimistic attitude and love for adventure, he navigates through high school life while learning valuable lessons about friendship and responsibility.

24. Omi ( Oddbods )

From the popular British animated series Oddbods, Omi is a pink creature with a big heart and a love for all things cute. With her friends, she gets into silly and humorous situations while learning important lessons about acceptance and diversity.

25. Octavius “Ock” Decker ( Kubo and the Two Strings )

From the animated movie Kubo and the Two Strings, Ock is a beetle samurai who helps the main character, Kubo, on his quest to find his father’s armor. Despite being gruff and serious at first, he becomes a loyal friend and mentor to Kubo in their journey.

More Cartoon Characters Starting with Letter O:

S.No: Character Name Anime Series/Movie Name
1 Olaf Frozen
2 Oswald the Lucky Rabbit Oswald the Lucky Rabbit
3 Owl Winnie the Pooh
4 Orville The Rescuers
5 Otto Rocket Rocket Power
6 Oaken Frozen
7 Oogie Boogie The Nightmare Before Christmas
8 Octavius Catto Liberty’s Kids
9 Omi Xiaolin Showdown
10 Oscar Shark Tale
11 Odie Garfield
12 Officer Clawhauser Zootopia
13 Orin Scrivello Little Shop of Horrors
14 Oona Bubble Guppies
15 Officer Dibble Top Cat
16 Officer Judy Hopps Zootopia
17 Osmosis Jones Osmosis Jones
18 Odd Della Robbia Code Lyoko
19 Optimus Prime Transformers
20 Obi-Wan Kenobi Star Wars: The Clone Wars
21 Oh Home
22 Orko He-Man and the Masters of the Universe
23 One Seven Little Monsters
24 Om Nom Cut the Rope
25 Olive Oyl Popeye
26 Orange Blossom Strawberry Shortcake
27 Overkill Danger Mouse
28 Orson Pig U.S. Acres
29 Oliver Warbucks Annie
30 Outlaw The Animals of Farthing Wood
31 Opalescence My Little Pony
32 Orion DC Comics
33 One-Eyed Jack The Real Ghostbusters
34 Otter Franklin
35 Onix Pokemon
36 Owen Total Drama
37 Oshawott Pokemon
38 Omochao Sonic X
39 Orbulon WarioWare, Inc.
40 One-One Infinity Train
41 Old Man Jenkins SpongeBob SquarePants
42 Overlord Ninjago
43 Ocelot Minecraft: Story Mode
44 Oddish Pokemon
45 Oblina Aaahh!!! Real Monsters
46 Orel Puppington Moral Orel
47 Olwin Chuggington
48 Orbit Rob the Robot
49 Opal Steven Universe
50 Otto Mann The Simpsons
51 Officer Lou The Simpsons
52 Ollie Williams Family Guy
53 Oliver Frensky Arthur
54 Olie Polie Rolie Polie Olie
55 Owlowiscious My Little Pony: Friendship Is Magic
56 Orgalorg Adventure Time
57 Omnidroid The Incredibles
58 Okoye Black Panther
59 Onyx DC Comics
60 Obelix Asterix
61 Orm Aquaman
62 Outrageous Orange Mr Men and Little Miss
63 Orville Wilbur Richard “Rick” Wright Rick and Morty
64 Orelsan The Uncredibles
65 Oxana Hauntley Vampirina
66 Oswald Cobblepot Batman: The Animated Series
67 Oddball 101 Dalmatians II: Patch’s London Adventure
68 Orddu The Black Cauldron
69 Orwen The Black Cauldron
70 Orgoch The Black Cauldron
71 Olivia Flaversham The Great Mouse Detective
72 Orddu, Orwen, and Orgoch The Black Cauldron
73 Oaken Frozen
74 Oliver Oliver & Company
75 Owl Winnie the Pooh


Overall, these 100 cartoon characters starting with the letter O showcase a diverse range of personalities and roles in various animated series, movies, and games. From brave heroes to mischievous sidekicks, each one brings their own unique charm and adds depth to their respective stories. Whether you enjoy action-packed adventures or heartwarming tales of friendship, there is an O character for everyone to love


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