| Iron Kid | June 2006 | Korean Broadcasting System | 26 |
| Iron Man: Armored Adventures | March 14, 2009 | France 4 | 52 |
| It's Pony | January 18, 2020 | Nickelodeon, YTV, Nickelodeon | 11 |
| It's Punky Brewster | September 14, 1985 | NBC | 26 |
| It's the Wolf | — | — | — |
| Jabberjaw | September 11, 1976 | American Broadcasting Company | 16 |
| Jackson 5ive | September 11, 1971 | American Broadcasting Company | 23 |
| Jacob Two-Two | September 7, 2003 | YTV | 62 |
| Jade Armor | — | — | — |
| Jake and the Never Land Pirates | February 14, 2011 | Disney Channel, Disney Jr. | 104 |
| James Bond Jr. | September 16, 1991 | Broadcast syndication | 65 |
| Jamie's Got Tentacles | September 9, 2013 | France 3 | 157 |
| Jane | — | — | — |
| Jelly Jamm | September 5, 2011 | Cartoonito, Clan | 78 |
| Jellystone! | July 29, 2021 | HBO Max | 30 |
| Jem | October 6, 1985 | Broadcast syndication | 65 |
| Jessica's Big Little World | October 2, 2023 | Cartoon Network, Cartoonito | 20 |
| Jimmy Neutron: Boy Genius Shorts | — | Nickelodeon | 12 |
| Jimmy Two-Shoes | February 13, 2009 | Télétoon, Disney XD | 52 |
| Jin Jin and the Panda Patrol | 1994 | — | 26 |
| Jo Kilat | January 30, 1998 | MediaCorp Suria | 13 |
| Jobi's Room | — | TV Rá-Tim-Bum | 26 |
| Joe the Little Boom Boom | December 1960 | Office de radiodiffusion télévision française | 13 |
| Johnny Test | September 17, 2005 | The CW, Cartoon Network, The WB, Cartoon Network, CITV | 117 |
| Jokebook | April 23, 1982 | NBC | 7 |
| Jonny Quest | September 18, 1964 | American Broadcasting Company | 39 |
| Joobi the Fantastic Fox | — | SBS TV | 26 |
| Joodyssey | — | KBS 1TV | — |
| Journey of Long | — | KBS 1TV | — |
| Jumanji | September 8, 1996 | UPN Kids, Bohbot Kids Network | 40 |
| Jungle Cubs | October 5, 1996 | American Broadcasting Company | 21 |
| Jungle Junction | October 5, 2009 | Disney Jr. | 46 |
| Jurassic War | — | MBC TV | 26 |
| Jurassic World: Chaos Theory | May 24, 2024 | — | 39 |
| Justice League Action Shorts | June 29, 2017 | YouTube | 22 |
| KaBlam! | October 1, 1996 | Nickelodeon | 47 |
| Kaeloo | June 6, 2010 | — | 202 |
| Kamp Koral: SpongeBob's Under Years | March 4, 2021 | Nickelodeon | 26 |
| Kangaroo Creek Gang | April 1, 2002 | Nine Network | 26 |
| Kangoo | 1996 | TF1 | 65 |
| Kangoo Juniors | — | TF1 | 104 |
| Karma's World | October 15, 2021 | Netflix | — |
| Kasztaniaki | — | TVP2 | — |
| Kay's Daily Doodles | — | Bilibili | — |
| Keluarga Somat | June 8, 2013 | — | — |
| Ketchup: Cats Who Cook | October 5, 1998 | — | 65 |
| Kick Buttowski: Suburban Daredevil | February 13, 2010 | Disney XD | 52 |
| Kid Clones | — | TF1 | — |
| Kid vs. Kat | October 25, 2008 | YTV | 52 |
| Kid-E-Cats | October 24, 2015 | STS | 208 |
| KikoRiki | May 17, 2004 | YouTube, TV Rain, Russia-1, Channel One Russia, Channel 31, STS, Russia-K, Domashny, Kinopoisk, Inter, Mir, K2+7 | 218 |
| Kill Dim | — | — | — |
| Kim Possible | June 7, 2002 | Disney Channel | 87 |
| King of the Hill | January 12, 1997 | Fox Broadcasting Company, Adult Swim | 259 |
| Kingdom Force | December 7, 2019 | ICI Radio-Canada Télé, CBC Kids | 26 |
| Kipo and the Age of Wonderbeasts | January 14, 2020 | Netflix | 30 |
| Koki | 1997 | — | — |
| Kung Fu Panda: Legends of Awesomeness | September 19, 2011 | Nickelodeon | 80 |
| Kung Fu Panda: The Dragon Knight | July 14, 2022 | Netflix | 42 |
| Kung Fu Panda: The Paws of Destiny | 2018 | Amazon Prime Video | 26 |