| Animaniacs | November 20, 2020 | Hulu | 102 |
| Animanimals | October 12, 2013 | — | — |
| Animator vs. Animation | June 3, 2006 | YouTube, Newgrounds, Atom.com | 14 |
| Anna's Tales | — | — | — |
| Anne of Green Gables: The Animated Series | September 2, 2001 | TVOKids | 26 |
| Ant-Man | June 10, 2017 | — | 6 |
| Any Malu Show | May 4, 2020 | Cartoon Network | — |
| Aotu World | — | — | 112 |
| Ape Escape | August 3, 2008 | Nicktoons | 19 |
| Apollo Gauntlet | July 9, 2017 | Adult Swim | 6 |
| Apollo's Tall Tales | — | — | — |
| Apple & Onion | February 23, 2018 | Cartoon Network | 76 |
| Apukunapa Kutimuynin | — | — | — |
| Aqua Teen Hunger Force | December 30, 2000 | Adult Swim | 139 |
| Aquaman | September 9, 1967 | CBS | 36 |
| Aquaman: King of Atlantis | 2021 | — | 3 |
| Arabian Knights | September 7, 1968 | NBC | 18 |
| Arcane | November 6, 2021 | Netflix, Tencent Video | 18 |
| Archer | September 17, 2009 | FX | 145 |
| Archibald le Magi-chien | 1980 | Broadcast syndication | 46 |
| Archibald the Koala | September 4, 1998 | ITV | 52 |
| Archibald's Next Big Thing | September 6, 2019 | Netflix | 26 |
| Archie's Weird Mysteries | October 2, 1999 | Ion Television | 40 |
| Argai: The Prophecy | April 15, 2001 | TF1 | 26 |
| Ariel | June 27, 2024 | Disney Jr. | 30 |
| Ariol | — | — | 137 |
| Arjun - Prince of Bali | — | — | — |
| Ark: The Animated Series | — | — | — |
| Armor Monster | — | Youman Cartoon Television | 40 |
| Armored Adventure | — | — | — |
| Around the World in 79 Days | September 6, 1969 | — | 17 |
| Around the World in 80 Days | September 9, 1972 | NBC, ABC Entertains | 16 |
| Around the World with Willy Fog | January 8, 1984 | La 1 | 26 |
| Art Odyssey | — | Korea Educational Broadcasting System | 52 |
| Arthur | October 7, 1996 | PBS | 253 |
| Arthur and the Children of the Round Table | September 15, 2018 | — | 52 |
| Arthur and the Minimoys | December 22, 2018 | Gulli | 26 |
| Arthur! and the Square Knights of the Round Table | 1966 | Australian Broadcasting Corporation | 35 |
| Arzak Rhapsody | December 30, 2003 | France 2 | 14 |
| As Aventuras de Gui & Estopa | 2009 | Cartoon Network | 89 |
| As Aventuras do Bob Zoom | 2018 | — | 24 |
| As Told by Ginger | October 25, 2000 | Nicktoons, Nickelodeon | 60 |
| Assy McGee | November 26, 2006 | Adult Swim, Cartoon Network | 20 |
| Asterix & Obelix: The Big Fight | May 30, 2025 | Netflix | 5 |
| Astro and the Space Mutts | — | — | 11 |
| Astro Farm | September 11, 1992 | CITV | 53 |
| Astro Plan | January 16, 2010 | — | 26 |
| Astroblast! | July 12, 2014 | Universal Kids | — |
| Atom Ant | October 2, 1965 | NBC | 26 |
| Atomic Betty | August 29, 2004 | Cartoon Network, Cartoon Network, M6 | 78 |
| Atomic Forest | 2012 | 2×2 | 19 |
| Atomic Puppet | July 18, 2016 | Disney XD | 26 |
| Attack of the Killer Tomatoes | September 8, 1990 | Fox Broadcasting Company | 21 |
| Audrey's Shelter | — | — | 52 |
| Augie Doggie and Doggie Daddy | September 19, 1959 | — | 45 |
| Avatar: Seven Havens | October 9, 2026 | Paramount+ | 13 |
| Avatar: The Last Airbender | February 21, 2005 | Nickelodeon | 61 |
| Avenger Penguins | September 22, 1993 | ITV | 26 |
| Avārijas brigāde | 1991 | — | — |
| Awesome Magical Tales | December 31, 2012 | Raidió Teilifís Éireann, Univision, Seven Network, 7Two, Hub Network | 26 |