| Lapitch the Little Shoemaker | 2001 | — | 26 |
| Larryboy: The Cartoon Adventures | March 16, 2002 | — | 4 |
| Larva | March 26, 2011 | — | 275 |
| Lascars | 1998 | Canal+ | — |
| Lassie's Rescue Rangers | November 11, 1972 | American Broadcasting Company | 16 |
| Lastman (TV series) | — | France 4 | 32 |
| Laurel and Hardy | September 10, 1966 | Broadcast syndication | 156 |
| Lavender Castle | January 7, 1999 | ITV | 26 |
| Laverne & Shirley | October 10, 1981 | American Broadcasting Company | 13 |
| Lazor Wulf | April 7, 2019 | Adult Swim, Cartoon Network | — |
| Lazy Lucy | September 4, 2004 | KiKA, TiJi, France 5 | 52 |
| Le Collège Noir - Lament from Auvergne | — | — | 6 |
| Le incredibili indagini dell'ispettore Nasy | — | Rai 1 | — |
| Le Nidouille | — | Télétoon+ | 52 |
| Le Petit Nicolas | 2008 | M6 | 104 |
| Le Piaf | — | Canal+ | 200 |
| League of Super Evil | March 7, 2009 | YTV | 52 |
| Learning Time with Timmy | May 24, 2018 | — | 27 |
| Legend of Princess Chang-Ge | — | Bilibili | — |
| Legend of Shao-Lin Kong Fu | — | CTS Main Channel | — |
| Legend of the Dragon | July 29, 2005 | BBC Children's and Education | 39 |
| Legend of the Silk Road: The Great Chart | — | CCTV-14 Children | 52 |
| Legend of the Silk Road: Zhang Qian the Envoy | October 8, 2018 | CCTV-14 Children | 52 |
| Legend of the Three Caballeros | June 9, 2018 | — | 13 |
| Legend of Yang Chen | — | — | — |
| Legend Quest | February 24, 2017 | Netflix | 13 |
| Legendary Overlord | — | — | — |
| Legends of Bikini Bottom | January 28, 2011 | Nickelodeon | 6 |
| Legends of Chima | January 16, 2013 | Cartoon Network | 40 |
| Legion of Super Heroes | September 23, 2006 | The CW, Kids' WB | 26 |
| Lego Bionicle: The Journey to One | March 4, 2016 | — | — |
| Lego City Adventures | 2019 | Nickelodeon | 26 |
| Lego Elves: Secrets of Elvendale | September 1, 2017 | — | — |
| Lego Marvel Avengers: Strange Tails | November 14, 2025 | Disney+ | 2 |
| LEGO Marvel short films | 2013 | — | 10 |
| Lego Nexo Knights | December 18, 2015 | Cartoon Network | 40 |
| Lego One Piece | September 29, 2026 | — | 2 |
| Lego Star Wars: All-Stars | — | — | — |
| Lego Star Wars: Droid Tales | July 6, 2015 | Disney XD | 5 |
| Lego Star Wars: Rebuild the Galaxy | September 13, 2024 | — | 4 |
| Lego Star Wars: The Freemaker Adventures | June 20, 2016 | Disney XD | 26 |
| Lego Star Wars: The Resistance Rises | — | Disney XD | 5 |
| Lego Star Wars: The Yoda Chronicles | — | Cartoon Network | — |
| Lele Convenience Store | February 4, 2026 | Bilibili | 10 |
| Leo & Tig | September 17, 2016 | Carousel, Mult | 78 |
| Leo and Fred | 1984 | — | 26 |
| Leo da Vinci | 2019 | Rai Gulp, RaiPlay | 52 |
| Les Aventures de Colargol | 1968 | ORTF Télévision 2 | 53 |
| Les Aventures de Tintin | November 28, 1957 | — | 15 |
| Les Kiwis | October 19, 2013 | — | 130 |
| Les Misérables | — | TF1 | 26 |
| Les Triplés | — | TF1, France 5 | 78 |
| Let's Go Luna! | November 21, 2018 | TVOKids, PBS Kids, Knowledge Kids | 64 |
| Let's Go Pocoyo! | July 3, 2010 | Clan | 52 |
| Let's go to school Jaedong | — | — | — |
| Let's Go! Galaxy Guards | — | Korea Educational Broadcasting System, Mango TV | 52 |
| Let's Go, Bananas! | April 19, 2024 | Cartoon Network, CBC Kids, Sky Kids | 26 |
| Let's Gorilla! | — | KBS 2TV | — |
| Letayushchiye zveri | August 11, 2012 | Carousel, OTV, Самара-ГИС (телеканал), Saint Petersburg, Mult | 44 |
| Lexi & Lottie - Trusty Twin Detectives | 2017 | — | 26 |