| The Little Mermaid | September 12, 1992 | CBS | 31 |
| The Little Rascals | September 25, 1982 | American Broadcasting Company | 22 |
| 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 Order | — | — | — |
| The Magic School Bus | September 10, 1994 | PBS, Qubo | 52 |
| 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 Merrie Melodies Show | — | Broadcast syndication | 24 |
| The Midnight Gospel | April 20, 2020 | Netflix | 8 |
| The Mighty B! | April 26, 2008 | Nickelodeon | 40 |
| The Mighty Heroes | October 29, 1966 | CBS | 20 |
| The Mighty Nein | November 19, 2025 | Amazon Prime Video | — |
| The Monchhichis/Little Rascals/Richie Rich Show | September 10, 1983 | — | — |
| The Mouse and the Monster | 1996 | UPN | 13 |
| The Mouse Factory | 1972 | — | 43 |
| The Moxy Show | November 26, 1993 | Cartoon Network | 24 |
| The Mumbly Cartoon Show | September 11, 1976 | American Broadcasting Company | 16 |
| The Mummy | September 29, 2001 | Kids' WB | 26 |
| The New Adventures of Batman | February 10, 1977 | CBS | 16 |
| The New Adventures of Beany and Cecil | September 10, 1988 | — | 5 |
| The New Adventures of Flash Gordon | September 22, 1979 | NBC | 32 |
| The New Adventures of Gilligan | September 7, 1974 | American Broadcasting Company | 24 |
| The New Adventures of He-Man | September 1, 1990 | — | 65 |
| The New Adventures of Mighty Mouse and Heckle & Jeckle | September 8, 1979 | CBS | 48 |
| The New Adventures of Superman | September 10, 1966 | CBS | 68 |
| The New Adventures of the Lone Ranger | September 13, 1980 | CBS | 28 |
| The New Adventures of Winnie the Pooh | January 17, 1988 | American Broadcasting Company, Disney Channel | 52 |
| The New Adventures of Zorro | September 20, 1997 | Kids' WB | 26 |
| The New Adventures of Zorro | September 12, 1981 | CBS | 13 |
| The New Batman Adventures | September 13, 1997 | The WB, Kids' WB | 24 |
| The New Batman/Superman Adventures | September 13, 1997 | The WB | — |
| The New Fantastic Four | September 9, 1978 | NBC | 13 |
| The New Fred and Barney Show | February 3, 1979 | NBC | 17 |
| The New Scooby and Scrappy-Doo Show | September 10, 1983 | American Broadcasting Company | 52 |
| The New Scooby-Doo Movies | September 9, 1972 | CBS | 24 |
| The New Shmoo | September 22, 1979 | NBC | 16 |
| The New Three Stooges | October 1965 | Broadcast syndication | — |
| The New Yogi Bear Show | September 12, 1988 | Broadcast syndication | 45 |
| The Nutshack | — | Myx | 16 |
| The Nutty Squirrels Present | September 1960 | Broadcast syndication | — |
| The Oblongs | April 1, 2001 | The WB | 13 |
| The Oddball Couple | September 6, 1975 | American Broadcasting Company | 16 |
| The Off-Beats | November 29, 1996 | Nickelodeon | 14 |
| The Ollie & Moon Show | May 27, 2017 | France 4, TVOKids, Universal Kids, Knowledge Kids | 52 |
| The Osmonds | September 9, 1972 | American Broadcasting Company | 17 |
| The Owl House | January 10, 2020 | Disney Channel, Disney XD | 43 |
| The Oz Kids | September 14, 1996 | ABC Kids | 26 |
| The Pac-Man/Little Rascals/Richie Rich Show | September 25, 1982 | American Broadcasting Company | — |
| The Patrick Star Show | July 9, 2021 | Nickelodeon | 39 |
| The Pebbles and Bamm-Bamm Show | September 11, 1971 | CBS | 16 |
| The Penguins of Madagascar | November 29, 2008 | Nickelodeon | 80 |
| The Perils of Penelope Pitstop | September 13, 1969 | American Broadcasting Company | 17 |
| The Pink Panther | September 13, 1993 | Broadcast syndication | 60 |
| The Pink Panther Show | December 18, 1964 | NBC | 124 |
| The Pirates of Dark Water | February 25, 1991 | American Broadcasting Company, Broadcast syndication | 21 |