| Coconut Fred's Fruit Salad Island | September 17, 2005 | Kids' WB | 13 |
| Code Lyoko | September 3, 2003 | France 3 | 97 |
| Code Monkeys | July 11, 2007 | G4 | 26 |
| Codename X | — | KBS 1TV | 26 |
| Codename: Kids Next Door | December 6, 2002 | Cartoon Network | 78 |
| Colourblocks | September 12, 2022 | CBeebies | 45 |
| Comi and Bebe | — | EBS 1TV | — |
| Common Side Effects | February 2, 2025 | Adult Swim | 10 |
| Conan the Adventurer | September 12, 1992 | Broadcast syndication | 65 |
| Conch Bay | 2008 | CCTV-14 Children | 130 |
| Constantine: City of Demons | March 24, 2018 | CW Seed | 2 |
| Cooking with Valkyries | — | — | — |
| Cool McCool | September 10, 1966 | NBC | 20 |
| Corduroy | September 30, 2000 | TVOKids | 26 |
| Corn & Peg | March 4, 2019 | Nickelodeon | 40 |
| Corn and Cluck | 1971 | — | 26 |
| Corner Gas Animated | April 2, 2018 | CTV Comedy Channel, Amazon Freevee | 48 |
| Corto Maltese | 2003 | — | — |
| Cosmic Cowboys | December 29, 2003 | KiKA, Vrak.TV, France 3 | 52 |
| Cosmic Quantum Ray | 2009 | KiKA, Discovery Family, France 3 | 26 |
| Count Duckula | September 6, 1988 | ITV | 65 |
| Counterfeit Cat | May 12, 2016 | Disney XD | 52 |
| Courage the Cowardly Dog | November 12, 1999 | Cartoon Network | 52 |
| Courageous Cat and Minute Mouse | 1960 | Broadcast syndication | 130 |
| Cow and Chicken | December 15, 1995 | Cartoon Network | 52 |
| Cracked | September 5, 2016 | Télétoon | 52 |
| Crafty Kids Club | — | France 5 | — |
| Craig of the Creek | March 30, 2018 | Cartoon Network | 180 |
| Crash Canyon | May 3, 2011 | Cartoon Network | 26 |
| Crashbox | February 1, 1999 | HBO | 52 |
| Creative Galaxy | April 19, 2013 | Amazon Prime Video | 36 |
| Creature Comforts | October 1, 2003 | ITV | 27 |
| Creature Commandos | December 5, 2024 | HBO Max | 7 |
| Creepschool | March 13, 2004 | France 3 | 26 |
| Creepy Crawlers | October 4, 1994 | Channel 4, Italia 1, Canale 5, M6, The Children's Channel | 22 |
| CricketPang | — | Munhwa Broadcasting Corporation | — |
| Crisis Jung | 2018 | — | 10 |
| Cro | September 18, 1993 | American Broadcasting Company | 20 |
| Crocadoo | May 31, 1996 | Nine Network | 52 |
| Crossing Swords | June 12, 2020 | Hulu | 20 |
| Crusader Rabbit | August 1, 1950 | Broadcast syndication | 455 |
| Cubix | August 11, 2001 | Seoul Broadcasting System | 26 |
| Cupcake & Dino: General Services | July 27, 2018 | Netflix | 26 |
| Cupid's Chocolates | — | Tencent Video | 30 |
| Cupido | September 14, 1991 | France 2 | 24 |
| Curious George | September 4, 2006 | PBS Kids, Peacock | 198 |
| Curious George | — | — | — |
| Curucuru and Friends | November 24, 2006 | — | 39 |
| CUTIE CUBIES | September 13, 2017 | Nickelodeon, Carousel, Mult | 36 |
| Cyberchase | January 21, 2002 | Cartoon Network, CBC Television, TV Brasil, Band, TV Cultura, PBS Kids, PBS Kids Go! | 153 |
| Cybersix | September 6, 1999 | Cartoon Network, Kids Station | 13 |
| Cyberslav | — | — | — |
| Cywilizacja | — | Telewizja Polska | 10 |
| Cédric | December 23, 2001 | France 3 | 156 |
| D'Myna Leagues | January 6, 2001 | — | — |
| D.N. Ace | July 6, 2019 | Cartoon Network | 40 |
| Da Boom Crew | September 11, 2004 | — | 13 |
| Da Jammies | August 31, 2015 | Netflix | 13 |
| Daft Planet | September 2, 2002 | Cartoon Network | 13 |
| Dalja, the Vampire Girl | — | Tooniverse | 26 |