| Years in animation |
|---|
| Centuries |
| Decades |
| Years |
2004 in animation is an overview of notable events, including notable awards, list of films released, television show debuts and endings, and notable deaths.
| Date | Title | Channel | Year |
|---|---|---|---|
| January 18 | Whoopi's Littleburg | Nickelodeon | 2004 |
| January 19 | The Koala Brothers | Playhouse Disney | 2004–2007 |
| January 23 | Dave the Barbarian | Disney Channel | 2004–2005 |
| January 31 | Transformers: Energon | Cartoon Network | |
| February 16 | Witch Hunter Robin | Adult Swim | 2004 |
| February 27 | Duel Masters | Cartoon Network | 2004–2006 |
| March 4 | Tripping the Rift | Syfy | 2004–2005 |
| March 10 | Game Over | UPN | 2004 |
| April 3 | Danny Phantom | Nickelodeon | 2004–2007 |
| April 12 | Peep and the Big Wide World | Discovery Kids | |
| April 24 | Wolf's Rain | Adult Swim | 2004 |
| April 28 | Shorties Watchin' Shorties | Comedy Central | |
| May 1 | Megas XLR | Cartoon Network | 2004–2005 |
| May 31 | Peppa Pig | Nick Jr. | 2004–2018 |
| June 19 | Winx Club | Fox Box, Nickelodeon | 2004–2019 |
| June 20 | Fatherhood | Nick at Nite | 2004–2005 |
| July 30 | O'Grady | The N | 2004–2006 |
| July 31 | Justice League Unlimited | Cartoon Network | |
| August 1 | Stroker & Hoop | Adult Swim | 2004–2005 |
| August 13 | Foster's Home for Imaginary Friends | Cartoon Network | 2004–2009 |
| August 21 | Brandy & Mr. Whiskers | Disney Channel | 2004–2006 |
| August 31 | Father of the Pride | NBC | 2004–2005 |
| September 6 | Atomic Betty | Teletoon | 2004–2008 |
| September 7 | Miss Spider's Sunny Patch Friends | Nickelodeon | 2004–2008 |
| September 11 | The Batman | Kids' WB | |
| Da Boom Crew | 2004–2005 | ||
| Pokémon: Advanced Challenge | |||
| September 13 | Higglytown Heroes | Playhouse Disney | 2004–2008 |
| September 16 | Video Mods | MTV | 2004–2005 |
| September 18 | F-Zero: GP Legend | Fox Box | |
| One Piece [n 1] | Fox Box, Cartoon Network, Adult Swim, TVoD | 2004–2009; 2013–2017; 2020–present [n 2] | |
| Super Robot Monkey Team Hyperforce Go! | Jetix | 2004–2006 | |
| October 11 | The Backyardigans | Nickelodeon | 2004–2013 |
| Maya & Miguel | PBS Kids | 2004–2007 | |
| Postcards from Buster | 2004–2012 | ||
| October 24 | Nicktoons Film Festival | Nicktoons | 2004–2009 |
| October 27 | Drawn Together | Comedy Central | 2004–2007 |
| November 5 | Cartoon Alley | Turner Classic Movies | |
| November 6 | Fullmetal Alchemist | Adult Swim | 2004–2009 |
| Ghost in the Shell: Stand Alone Complex | 2004–2006 | ||
| November 7 | Perfect Hair Forever | 2004–2007 | |
| The Super Milk Chan Show | 2004–2005 | ||
| 6teen | Cartoon Network | 2004–2010 | |
| November 8 | ToddWorld | Discovery Kids | 2004–2008 |
| November 14 | Tom Goes to the Mayor | Adult Swim | 2004–2006 |
| November 19 | Hi Hi Puffy AmiYumi | Cartoon Network | |
| December 18 | W.I.T.C.H. | ABC Family | |
| Unknown | This Just In! | Spike TV | 2004 |
| Date | Title | Channel | Year | Notes |
|---|---|---|---|---|
| January 16 | He-Man and the Masters of the Universe | Cartoon Network | 2002–2004 | Cancelled |
| January 23 | Fillmore! | Toon Disney | ||
| January 24 | Cubix: Robots for Everyone | Kids' WB | 2001–2004 | Ended |
| February 6 | Little Bill | Nick Jr. | 1999–2004 | |
| February 27 | Lloyd in Space | Toon Disney | 2001–2004 | |
| February 29 | The Weekenders | 2000–2004 | ||
| March 10 | Game Over | UPN | 2004 | Cancelled |
| April 1 | Stripperella | Spike TV | 2003–2004 | |
| April 4 | Home Movies | Adult Swim | 1999–2004 | Ended |
| April 12 | Space Ghost Coast to Coast | 2001–2004 | Cancelled, until revived by GameTap in 2006. | |
| April 28 | Rolie Polie Olie | Playhouse Disney | 1998–2004 | Ended |
| May 22 | Static Shock | Kids' WB | 2000–2004 | |
| May 29 | Justice League | Cartoon Network | 2001–2004 | |
| June 7 | Whoopi's Littleburg | Nickelodeon | 2004 | Cancelled |
| June 8 | Hey Arnold! | 1996–2004 | Ended | |
| June 11 | The Wild Thornberrys | 1998–2004 | ||
| June 25 | VH1 ILL-ustrated | VH1 | 2003–2004 | Cancelled |
| July 5 | Ozzy & Drix | Kids' WB | 2002–2004 | |
| July 30 | Rocket Power | Nickelodeon | 1999–2004 | Ended |
| August 1 | Rugrats | 1991–1994, 1996–2004 | ||
| August 17 | Teamo Supremo | Toon Disney | 2002–2004 | |
| August 27 | Johnny Bravo | Cartoon Network | 1997–2004 | |
| September 4 | Pokémon: Advanced | Kids' WB | 2003–2004 | |
| September 25 | Samurai Jack | Cartoon Network | 2001–2004 | Cancelled, until revived by Adult Swim in 2017. |
| October 11 | SpongeBob SquarePants | Nickelodeon | 1999–2004 | Ended, until revived by Nickelodeon in 2005. |
| October 22 | Evil Con Carne | Cartoon Network | 2003–2004 | |
| November 26 | Stanley | Playhouse Disney | 2001–2004 | Cancelled |
| December 16 | Shorties Watchin' Shorties | Comedy Central | 2004 | |
| Unknown | This Just In! | Spike TV |
{{cite web}}: CS1 maint: archived copy as title (link)Peggy DeCastro, the oldest member of the DeCastro Sisters, the Latin singing group that gained fame with the 1950s hit Teach Me Tonight and was a popular attraction at Las Vegas hotels and nightclubs for years, died here on March 6. She was 82. The cause was lung cancer, her manager, Alan Eichler, said.