| 10 + 2 | 1991 | Television of Catalonia | 52 |
| 1000 Bad Deeds | 2009 | TV4 | 11 |
| 1001 Nights | December 25, 2011 | Cartoon Network | 52 |
| 101 Dalmatian Street | December 14, 2018 | Disney Channel | 52 |
| 101 Dalmatians: The Series | September 1, 1997 | American Broadcasting Company, Broadcast syndication | 65 |
| 12 Chinese Zodiac Signs | 1995 | — | — |
| 12 oz. Mouse | June 19, 2005 | Adult Swim, Cartoon Network | 22 |
| 123 Number Squad! | February 13, 2023 | Sky Kids | 108 |
| 2 Stupid Dogs | September 5, 1993 | TBS, Cartoon Network | 39 |
| 2DTV | October 14, 2001 | ITV | — |
| 3 Amigonauts | August 5, 2017 | YTV | 26 |
| 3-South | November 7, 2002 | MTV | 13 |
| 3Below: Tales of Arcadia | December 21, 2018 | Netflix | 26 |
| 3rd & Bird | June 4, 2008 | CBeebies | 52 |
| 44 Cats | November 12, 2018 | Rai Yoyo, Nick Jr. | 104 |
| 50/50 Heroes | October 24, 2022 | — | — |
| 64 Zoo Lane | February 18, 1999 | France 5 | 104 |
| 6teen | November 7, 2004 | Nickelodeon, 2×2, Cartoon Network | 93 |
| A Bunch of Munsch | December 7, 1991 | CTV Television Network | 13 |
| A Kind of Magic | 2008 | France 3 | 78 |
| A kockásfülű nyúl | August 26, 1977 | — | — |
| A legkisebb ugrifüles | 1975 | Magyar Televízió | 26 |
| A Little Curious | 1998 | HBO | 43 |
| A Miss Mallard Mystery | September 4, 2000 | Cartoon Network | 26 |
| A Mortal's Journey | — | Bilibili | — |
| A nagy ho-ho-horgász | 1982 | — | — |
| A Portrait Of Jianghu: Bad Guys | — | — | — |
| A Pup Named Scooby-Doo | September 10, 1988 | American Broadcasting Company | 30 |
| A Tale Dark & Grimm | October 8, 2021 | Netflix | 10 |
| A Thousand and One... Americas | 1989 | — | 26 |
| A Town Called Panic | 2002 | — | 20 |
| A Will Eternal | — | Tencent Video | — |
| A-jang.com | — | KBS 2TV | 13 |
| A.T.O.M. | August 27, 2005 | Jetix | 52 |
| Aaahh!!! Real Monsters | October 29, 1994 | Nickelodeon | 52 |
| Abby Hatcher | December 25, 2018 | Nickelodeon | 52 |
| ABC with Kenny G | — | — | — |
| Abominable and the Invisible City | — | — | — |
| About Dima | — | — | — |
| Abraca | December 19, 2019 | Okoo | 26 |
| Ace Ventura: Pet Detective | December 9, 1995 | CBS | 39 |
| Achille Talon | 1963 | — | — |
| Action League Now! | October 14, 1995 | Nickelodeon | 65 |
| Action Monster Big Movie | April 24, 2026 | Bilibili | — |
| Action Pack | January 4, 2022 | Netflix | 17 |
| Ada Twist, Scientist | September 28, 2021 | Netflix | 41 |
| Adiboo Adventure : Inside the Human Body | — | France 5 | 40 |
| Adit Sopo Jarwo | — | GTV, Trans TV, MNCTV | 40 |
| Adrian | January 21, 2019 | Canale 5 | 9 |
| Adventure Time | April 5, 2010 | Nicktoons, Cartoon Network, Cartoon Network | 278 |
| Adventure Time: Fionna and Cake | August 31, 2023 | HBO Max | 20 |
| Adventure Time: Side Quests | June 29, 2026 | Hulu, Disney+ | — |
| Adventurer Carly | — | Golden Eagle Cartoon | 104 |
| Adventurers: Masters of Time | 2003 | — | 26 |
| Adventures from the Book of Virtues | September 2, 1996 | PBS Kids | 39 |
| Adventures in Wonder Park | 2025 | Nickelodeon | 20 |
| Adventures of Captain Vrungel | — | Soviet Central Television | 13 |
| Adventures of Peter and the Wolf | 2020 | — | — |
| Adventures of Pow Wow | January 30, 1949 | — | — |
| Adventures of Sonic the Hedgehog | December 3, 1993 | Broadcast syndication | 66 |