| Liberty's Kids | September 2, 2002 | PBS | 40 |
| Life with Louie | December 18, 1994 | Fox Broadcasting Company | 39 |
| Lifeboat Luke | — | — | — |
| Like, Share, Die | January 29, 2015 | — | 16 |
| Lil Glooscap and the Legends of Turtle Island | — | — | — |
| Lil' Bush | June 13, 2007 | Comedy Central | 17 |
| Lil' Elvis and the Truckstoppers | March 6, 1997 | ABC Television | 26 |
| Lillefinger | — | — | 26 |
| Lilly the Witch | September 4, 2004 | CBBC | 52 |
| Lilo & Stitch: The Series | September 20, 2003 | Disney Channel | 65 |
| Lily's Driftwood Bay | May 5, 2014 | Nick Jr. | 100 |
| Ling Tian Du Zun | — | — | — |
| Lingwu Continent | — | — | — |
| Link Click | April 30, 2021 | — | 29 |
| Linus the Lionhearted | September 26, 1964 | CBS | 39 |
| Lippy the Lion & Hardy Har Har | September 3, 1962 | Broadcast syndication | 52 |
| Liquid Television | June 2, 1991 | MTV | 27 |
| Little Bear | November 6, 1995 | Nickelodeon, CBC Television | 65 |
| Little Bill | November 28, 1999 | Nickelodeon, Nick Jr., BET | 127 |
| Little Brown Bear | — | France 3 | 100 |
| Little Charmers | January 12, 2015 | Nick Jr. Channel | 40 |
| Little Demon | August 25, 2022 | FX | 10 |
| Little Dracula | September 3, 1991 | — | 26 |
| Little Dreamer Gguda | — | KBS 1TV | — |
| Little Einsteins | October 9, 2005 | Playhouse Disney, Disney Channel | 67 |
| Little Ellen | September 13, 2021 | — | 20 |
| Little Heroes | September 2, 2022 | Carousel, Mult | 52 |
| Little J & Big Cuz | — | National Indigenous Television | — |
| Little King Macius | 2002 | Telewizja Polska | 52 |
| Little Lulu | December 30, 1944 | — | — |
| Little Monsters | September 14, 1998 | BBC One | 52 |
| Little Mouse on the Prairie | 1997 | Freeform | 26 |
| Little Princess | October 9, 2006 | Channel 5, Milkshake! | 135 |
| Little Princess School | — | — | — |
| Little Red Tractor | January 5, 2004 | Nickelodeon | 75 |
| Little Robots | January 7, 2003 | CBeebies | 65 |
| Little Rosey | September 8, 1990 | American Broadcasting Company | 13 |
| Little Shop | September 7, 1991 | Fox Broadcasting Company | 13 |
| Little Vampire | 2003 | — | 26 |
| Little Wizards | September 26, 1987 | American Broadcasting Company | 13 |
| Littlekenny | 2019 | — | 6 |
| Littlest Pet Shop | October 16, 1995 | Broadcast syndication | 40 |
| Littlest Pet Shop | November 10, 2012 | TF1 | 104 |
| Littlest Pet Shop: A World of Our Own | April 14, 2018 | Discovery Family | 52 |
| Living with Dad | 2022 | Gulli, Canal J | — |
| Lizzie's Library | November 6, 1995 | Australian Broadcasting Corporation | 26 |
| Lloyd in Space | February 3, 2001 | American Broadcasting Company | 39 |
| LMN's: Adventures in the Microworld | — | — | 52 |
| Loafy | — | — | — |
| Loggerheads | 1998 | — | 16 |
| Lola & Virginia | March 14, 2006 | Disney Channel, Euskal Telebista | — |
| LoliRock | October 18, 2014 | France 3 | 52 |
| Long Live the Royals | May 16, 2014 | Cartoon Network | 4 |
| Long Story Short | August 22, 2025 | Netflix | 10 |
| Lookism | December 8, 2022 | — | — |
| Loonatics Unleashed | September 17, 2005 | The WB | 26 |
| Looney Tunes Cartoons | May 27, 2020 | HBO Max | 82 |
| Looped | March 2, 2016 | Cartoon Network | 26 |
| Los Lopeggs | June 17, 2021 | — | — |
| Los Pepa | 2009 | Señal Colombia | — |