| The Wrong Way to Use Healing Magic | January 6, 2024 | — | 13 |
| The Wuzzles | September 14, 1985 | CBS | 13 |
| The Yakuza's Guide to Babysitting | July 7, 2022 | — | 12 |
| The Yearling | November 8, 1983 | NHK General TV | 52 |
| The Yogi Bear Show | January 30, 1961 | American Broadcasting Company | 52 |
| The Young Challengers | May 11, 2026 | Korean Central Television | — |
| The Yuzuki Family's Four Sons | October 5, 2023 | — | 12 |
| The Zeta Project | January 27, 2001 | The WB | 26 |
| The ZhuZhus | September 12, 2016 | Disney Channel | 26 |
| The Zimmer Twins | — | — | 106 |
| The Zula Patrol | September 5, 2005 | — | 52 |
| There She Is!! | 2004 | — | 5 |
| There Was a Cute Girl in the Hero's Party, So I Tried Confessing to Her | January 6, 2026 | — | 13 |
| There's No Freaking Way I'll be Your Lover! Unless... | July 7, 2025 | — | — |
| Thermae Romae | January 13, 2012 | — | — |
| Thermae Romae Novae | March 28, 2022 | — | 11 |
| These Are the Days | September 7, 1974 | American Broadcasting Company | 16 |
| This Art Club Has a Problem! | July 7, 2016 | — | 12 |
| This Boy Is a Professional Wizard | February 5, 2016 | — | 4 |
| This Is America, Charlie Brown | October 21, 1988 | CBS | 8 |
| This is Chukpa | — | — | 50 |
| This Just In! | 2004 | Paramount Network | — |
| This Monster Wants to Eat Me | October 2, 2025 | — | 13 |
| This Ugly yet Beautiful World | April 2, 2004 | TBS Television | 12 |
| This World Can't Tear Me Down | 2023 | Netflix | 6 |
| Thomas & Friends | October 9, 1984 | ITV1, Channel 5, Nick Jr. | 584 |
| Thomas & Friends: All Engines Go | September 13, 2021 | Cartoon Network, Netflix, Cartoonito | 148 |
| Thor & Loki: Blood Brothers | — | — | — |
| Those Snow White Notes | April 3, 2021 | — | 12 |
| Those Who Hunt Elves | October 4, 1996 | — | 24 |
| Though I Am an Inept Villainess | July 12, 2026 | — | — |
| Three Delivery | June 27, 2008 | Nicktoons | 26 |
| Three from Prostokvashino | 1976 | Soviet Central Television | 3 |
| Three Girls in Action | January 22, 2024 | Disney Jr. | 1 |
| Three Kittens | 2009 | — | 49 |
| Three Leaves, Three Colors | April 11, 2016 | — | 12 |
| Throne of Seal | — | Tencent Video | — |
| Thrud | — | — | — |
| Thumbelina: A Magical Story | September 30, 1992 | — | 26 |
| Thundarr the Barbarian | October 4, 1980 | American Broadcasting Company | 21 |
| Thunder 3 | July 9, 2026 | — | — |
| Thunderbirds 2086 | April 17, 1982 | — | 24 |
| Thunderbirds Are Go! | April 4, 2015 | ITV | 70 |
| ThunderCats | July 29, 2011 | Cartoon Network | 26 |
| ThunderCats | January 23, 1985 | Broadcast syndication | 130 |
| ThunderCats Roar | February 22, 2020 | Cartoon Network | 52 |
| Thus Spoke Kishibe Rohan | 2017 | — | 4 |
| Tianwang | — | IQIYI | — |
| Tickety Toc | April 19, 2012 | Korea Educational Broadcasting System | 52 |
| Tico and Friends | January 16, 1994 | Fuji Television | 39 |
| Tide-Line Blue | July 6, 2005 | — | 13 |
| Tig n' Seek | July 23, 2020 | Cinemax | — |
| Tiger & Bunny | April 3, 2011 | — | 25 |
| Tiger Mask | October 2, 1969 | Nippon Television | — |
| Tiger Mask II | April 20, 1981 | — | 33 |
| Tiger Mask W | October 2, 2016 | — | — |
| TigerSharks | 1987 | Broadcast syndication | 26 |
| Tigga & Togga | February 16, 2006 | — | — |
| Tigtone | January 13, 2019 | Adult Swim | — |
| Tim Rex in Space | May 5, 2025 | Nickelodeon, Channel 5 | — |