The first two seasons of The Ren & Stimpy Show are fully released on DVD.
This is a list of notable events, premieres, releases, series cancellations and endings, and other business ventures for Nickelodeon in the year 2004.
However, according to some fans, this was the last year of Nick's "Golden Age" (that started c. 1990–91), due to many of their classic '90s/early 2000s shows and blocks (Rugrats, Hey Arnold!, The Wild Thornberrys, Rocket Power, The Brothers Garcia, SNICK, and Friday Night Nicktoons) ending this year. This was also the last year when SpongeBob SquarePants was at its peak quality (seasons 1–3) in the eyes of some fans and critics.
Drake & Josh and Ned's Declassified School Survival Guide notably premiered this year.
Shows
Series premieres
- January 11 - Drake & Josh
- April 3 - Danny Phantom premieres after the 2004 Kids' Choice Awards
- August 15 - LazyTown
- September 7 - Miss Spider's Sunny Patch Friends
- September 12 - Ned's Declassified School Survival Guide and Unfabulous
- October 11 - The Backyardigans
Season premieres
- September 24 - Dora the Explorer season 4
- November 11 - The Adventures of Jimmy Neutron: Boy Genius season 3
Series finales
- February 6 - Little Bill
- June 8 - Rugrats and Hey Arnold!
- June 11 - The Wild Thornberrys
- July 30 - Rocket Power
- August 8 - The Brothers Garcia
Programming blocks
- August 28 - SNICK ends.
- Friday Night Nicktoons ends.
Specials
- May 7 - The Jimmy Timmy Power Hour
- August 6 - ChalkZone: The Big Blow Up
International series
- September - Hi-5 premiered on Nickelodeon during Nick Jr. in Australia.
- Hi-5: Series 3 premiered on Nickelodeon in the Philippines.
Movies
Theatrical
- November 19 - The SpongeBob SquarePants Movie
- December 17 - Lemony Snicket's A Series of Unfortunate Events
Made-for-TV
- July 9 - The Adventures of Jimmy Neutron: Boy Genius: "Win, Lose and Kaboom!"
- July 23 - The Fairly OddParents: "Channel Chasers"
Books
- January
- January 6
- Blast from the Past
- Love Struck!
- Timmy Turner's Top-Secret Notebook
- Fairly Odd Jokes
- Up All Night
- Lemonade with a Twist
- February
- Everglades Escapades
- What's Cooking, SpongeBob?
- March
- Pirates of the Kiddy Pool
- 'Zine Scene
- April
- May
- June
- June 29 - A Really Big Wish
- July
- Out of Sight
- The Penguin Project
- August - Scout's Honor
- August 31 - Timmy's School Survival Handbook
- September - Too Many Turners
- September 21 - SpongeBob Exposed!: The Insider's Guide to SpongeBob SquarePants
- September 28 - In a Tizzy Over Turkey
- November
Albums
- September 28 - Dora the Explorer
- November 9 - The SpongeBob SquarePants Movie: Music from the Movie and More
Video games
- September 8 - The Fairly OddParents: Shadow Showdown (GameCube and PlayStation 2)
- September 14 - The Fairly OddParents: Shadow Showdown (Windows)
- September 20
- The Fairly OddParents: Shadow Showdown (Game Boy Advance)
- Nicktoons: Freeze Frame Frenzy
- October 19 - All Grown Up!: Express Yourself
- October 27 - The SpongeBob SquarePants Movie
Home video releases
VHS
- January 6 - SpongeBob SquarePants: The Seascape Capers
- January 27 - Blue's Clues: Classic Clues
- February 3 - The Fairly OddParents: Superhero Spectacle
- March 9 - SpongeBob SquarePants: SpongeBob Goes Prehistoric
- May 11 - Jimmy Timmy Power Hour
- May 25 - Blue's Clues: Blue Talks
- June 1 - SpongeBob SquarePants: SpongeGuard on Duty
- July 27 - Rocket Power: Island of the Menehune
- August 10 - Blue's Room: Snacktime Playdate
- August 31 - All Grown Up!: Lucky 13
- September 28 - Blue's Clues: Bluestock
- October 5
- The Amanda Show - Volume 1: Amanda, Please!
- The Amanda Show - Volume 2: The Girls' Room
- The Fairly OddParents: Channel Chasers
- November 2 - SpongeBob SquarePants: Sponge for Hire
- November 16 - All Grown Up!: O'Brother!
- November 23 - As Told by Ginger: The Wedding Frame
DVD
- January 6 - SpongeBob SquarePants: The Seascape Capers
- January 27 - Blue's Clues: Classic Clues
- February 3 - The Fairly OddParents: Superhero Spectacle
- March 9 - SpongeBob SquarePants: SpongeBob Goes Prehistoric
- May 11
- Invader Zim - Volume 1: Doom Doom Doom
- Jimmy Timmy Power Hour
- May 25 - Blue's Clues: Blue Talks
- June 1 - SpongeBob SquarePants: SpongeGuard on Duty
- July 27 - Rocket Power: Island of the Menehune
- August 10 - Blue's Room: Snacktime Playdate
- August 31
- All Grown Up!: Lucky 13
- Invader Zim - Volume 2: Progressive Stupidity
- September 28 - Blue's Clues: Bluestock
- October 5
- The Amanda Show - Volume 1: Amanda, Please!
- The Amanda Show - Volume 2: The Girls' Room
- The Fairly OddParents: Channel Chasers
- October 12 - Invader Zim - Volume 3: Horrible Holiday Cheer
- October 19 - SpongeBob SquarePants: The Complete 2nd Season
- November 2 - SpongeBob SquarePants: Sponge for Hire
- November 16 - All Grown Up!: O'Brother!
- November 23 - As Told by Ginger: The Wedding Frame
People
- January 26 - Addison Riecke is born.
- March 10 - Mace Coronel is born.
- April 6 - Casey Simpson is born.
- April 21 - Ron Augustin is born.
- June 4 - Candi Harris is born.
- August 19 - Siena Agudong is born.
- December 25 - Andre Robinson is born.
Character debuts
- All Grown Up!: Savannah Shane
- Danny Phantom: Danny Fenton, Jack Fenton, Tucker, Sam, Jazz Fenton, Maddie Fenton
- Drake & Josh: Drake Parker, Josh Nichols, Megan Parker, Walter Nichols, Audrey Parker-Nichols
- The Backyardigans: Pablo, Tyrone, Uniqua, Tasha, Austin
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