| The Legend of Nezha | June 1, 2003 | China Central Television | 52 |
| The Legend of Prince Valiant | September 3, 1991 | Freeform | 65 |
| The Legend of Qin | 2007 | — | 110 |
| The Legend of Sky Lord 3D | June 25, 2024 | IQIYI | 24 |
| The Legend of Tarzan | September 3, 2001 | UPN, Broadcast syndication | 39 |
| The Legend of Vox Machina | January 28, 2022 | Amazon Prime Video | 48 |
| The Legend of White Fang | 1992 | Family Channel | 26 |
| The Legend of Zelda | September 8, 1989 | Broadcast syndication | 13 |
| The Legend of Zeta & Ozz | February 18, 2019 | — | — |
| The Legends of Treasure Island | September 10, 1993 | ITV | 26 |
| The Liberator | November 11, 2020 | Netflix | 4 |
| The Life & Times of Tim | September 28, 2008 | HBO | 30 |
| The Life and Times of Juniper Lee | May 30, 2005 | Cartoon Network | 40 |
| The Lion Guard | November 22, 2015 | Disney Jr. | 74 |
| The Lionhearts | September 19, 1998 | Broadcast syndication | 13 |
| The Little Clowns of Happytown | September 26, 1987 | American Broadcasting Company | 18 |
| The Little Dinos | — | CCTV-14 Children | 52 |
| The Little Flying Bears | September 2, 1990 | ICI Radio-Canada Télé, Family Channel | 39 |
| The Little Hero | — | Channel 4 | 30 |
| The Little Lulu Show | November 11, 1995 | TV Globo, HBO, Boomerang, CTV Television Network, Cartoon Network, Sistema Brasileiro de Televisão, Record, Multishow, Family Channel, Disney Channel, TV Cultura, Nova Geração de Televisão | 52 |
| The Little Mermaid | September 12, 1992 | CBS | 31 |
| The Little Mole and Panda | 2016 | — | — |
| The Little Orchestra | 2022 | — | — |
| The Little Polar Bear | 1992 | — | 21 |
| The Little Prince | December 24, 2010 | France 3 | 78 |
| The Little Prince and Friends | — | France 5 | 52 |
| The Little Rascals | September 25, 1982 | American Broadcasting Company | 22 |
| The Little Spudragon | February 1, 2022 | ICI Radio-Canada Télé | 15 |
| The Little Witch | — | — | 14 |
| The Little Witches | September 3, 1997 | TF1 | 26 |
| The Littles | September 10, 1983 | American Broadcasting Company | 29 |
| The Lone Ranger | September 10, 1966 | CBS | 26 |
| The Looney Tunes Show | May 3, 2011 | Cartoon Network | 52 |
| The Loud House | May 2, 2016 | Nickelodeon | 268 |
| The Magic Key | September 4, 2000 | BBC Two | 26 |
| The Magic Order | — | — | — |
| The Magic Reindeer – Tales from the Polar Circle | — | — | 13 |
| The Magic Roundabout | 1963 | Office de radiodiffusion télévision française | 750 |
| The Magic School Bus | September 10, 1994 | PBS, Qubo | 52 |
| The Magic School Bus Rides Again | September 29, 2017 | Netflix | 30 |
| The Magical Adventures of Quasimodo | 1996 | Family Channel | 26 |
| The Magician | 1997 | France 3 | 39 |
| The Magilla Gorilla Show | 1964 | Broadcast syndication | 31 |
| The Marvel Super Heroes | September 1, 1966 | Broadcast syndication | 65 |
| The Marvelous Misadventures of Flapjack | June 5, 2008 | Cartoon Network | 46 |
| The Mask: Animated Series | August 12, 1995 | CBS | 54 |
| The Mechnimals | — | — | — |
| The Merrie Melodies Show | — | Broadcast syndication | 24 |
| The Midnight Gospel | April 20, 2020 | Netflix | 8 |
| The Mighty B! | April 26, 2008 | Nickelodeon | 40 |
| The Mighty Hercules | September 1, 1963 | Broadcast syndication | 128 |
| The Mighty Heroes | October 29, 1966 | CBS | 20 |
| The Mighty Nein | November 19, 2025 | Amazon Prime Video | — |
| The Minimighty Kids | 2008 | TF1, Télétoon+ | 233 |
| The Mojicons | October 19, 2015 | STS | 26 |
| The Monchhichis/Little Rascals/Richie Rich Show | September 10, 1983 | — | — |
| The Moomins | 1977 | TVP1 | 104 |
| The Mouse and the Monster | 1996 | UPN | 13 |
| The Mouse Factory | 1972 | — | 43 |
| The Moxy Show | November 26, 1993 | Cartoon Network | 24 |