| The Silver Brumby | October 29, 1994 | Network 10, Nine Network | 39 |
| The Smurfs | September 12, 1981 | NBC | 256 |
| The Super Heroes of Nature | 2023 | — | 30 |
| The Super Mario Bros. Super Show! | September 4, 1989 | CBS | 52 |
| The Sylvester & Tweety Mysteries | September 9, 1995 | The WB, Kids' WB | 52 |
| The Three Friends and Jerry | February 10, 1998 | — | 39 |
| The Tiny Chef Show | September 9, 2022 | Nickelodeon | — |
| The Tom and Jerry Show | April 9, 2014 | Cartoon Network | 117 |
| The Toothbrush Family | — | — | — |
| The Tricky Band | 2018 | À Punt | 28 |
| The Untouchables of Elliot Mouse | 1996 | Channel 4 | 26 |
| The Wawies | December 20, 2024 | Clan | 26 |
| The Wombles | February 5, 1973 | BBC Two | 60 |
| The Woohoos! | November 16, 2024 | Channel 5 | — |
| The World of Peter Rabbit and Friends | May 13, 1992 | British Broadcasting Corporation | 9 |
| The World of Tosh | January 26, 2002 | SVT1 | 26 |
| The ZhuZhus | September 12, 2016 | Disney Channel | 26 |
| The Zula Patrol | September 5, 2005 | — | 52 |
| These Are the Days | September 7, 1974 | American Broadcasting Company | 16 |
| Thomas & Friends | October 9, 1984 | ITV1, Channel 5, Nick Jr. | 584 |
| Thomas & Friends: All Engines Go | September 13, 2021 | Cartoon Network, Netflix, Cartoonito | 148 |
| Three Girls in Action | January 22, 2024 | Disney Jr. | 1 |
| TigerSharks | 1987 | Broadcast syndication | 26 |
| Tigga & Togga | February 16, 2006 | — | — |
| Tim Rex in Space | May 5, 2025 | Nickelodeon, Channel 5 | — |
| Time Cracks | 2004 | Australian Broadcasting Corporation | — |
| Timmy Time | April 6, 2009 | CBeebies | 68 |
| Timon & Pumbaa | September 8, 1995 | CBS, Broadcast syndication | 85 |
| Tina & Tony | 2015 | — | 208 |
| Tiny Ones Transport Service | June 14, 2019 | Disney Jr. | 75 |
| Tiny Toon Adventures | September 14, 1990 | Fox Broadcasting Company, Fox Kids | 98 |
| Tiny Toons Looniversity | September 9, 2023 | HBO Max | 10 |
| Titch | September 26, 1997 | ITV | 39 |
| Titipo Titipo | January 1, 2018 | EBS 1TV | — |
| Toad Patrol | October 2, 1999 | Cartoon Network | 26 |
| Tom & Jerry Kids | September 8, 1990 | Fox Broadcasting Company | 65 |
| Tom and Jerry in New York | July 1, 2021 | HBO Max | 52 |
| Tom and Jerry Tales | September 23, 2006 | Kids' WB | 26 |
| Tommy Zoom | — | CBeebies | — |
| Toonsylvania | February 7, 1998 | Fox Broadcasting Company | 21 |
| Toot & Puddle | November 16, 2008 | Nick Jr. Channel | 52 |
| Top Wing | November 6, 2017 | Nickelodeon | 52 |
| Total Drama Presents: The Ridonculous Race | September 7, 2015 | Cartoon Network, Cartoon Network | 26 |
| Totally Spies! | November 3, 2001 | TF1, Freeform, Gulli, Télétoon, Cartoon Network, Cartoon Network | 208 |
| Tottie: The Story of a Doll's House | — | — | 10 |
| Tracey McBean | February 18, 2002 | ABC Kids | 78 |
| Transformers: BotBots | March 25, 2022 | Netflix | 10 |
| Transformers: EarthSpark | November 11, 2022 | Nickelodeon, Paramount+ | 10 |
| Trash Truck | November 10, 2020 | Netflix | 28 |
| Trollhunters: Tales of Arcadia | December 23, 2016 | Netflix | 52 |
| Trollkins | September 12, 1981 | CBS | 13 |
| Trollz | October 3, 2005 | TFOU | 27 |
| TroTro | 2004 | France 5 | 78 |
| True and the Rainbow Kingdom | August 11, 2017 | Netflix | 37 |
| True: Magical Friends | June 15, 2018 | Netflix | — |
| True: Wonderful Wishes | June 15, 2018 | Netflix | — |
| Tumble Leaf | May 23, 2014 | Amazon Prime Video | 52 |
| Tupu | April 11, 2005 | ZDF, France 3, Disney Channel, Super Écran | 26 |
| Turbo Dogs | October 3, 2008 | CBC Kids, Qubo | 26 |
| Turning Mecard | — | — | 188 |