This is a list of notable events, premieres, releases, series cancellations and endings, and other business ventures for Nickelodeon in the year 2008.
Television
Series premieres
- March 15 - H2O: Just Add Water
- April 26 - The Mighty B!
- September 1 - Ricky Sprocket: Showbiz Boy on Nicktoons Network
- October 4 - Making Fiends on Nicktoons Network
- November 8 - True Jackson, VP
Season premieres
- January 21 - The Naked Brothers Band season 2
- February 18 - The Fairly OddParents season 6 (first post-revival)
- March 3 - SpongeBob SquarePants season 6
- September 27 - iCarly season 2
- October 18 - The Naked Brothers Band season 3
Specials
- February 18 - The Fairly OddParents: "Fairly OddBaby"
- July 16 - Avatar: The Last Airbender: "The Boiling Rock"
- July 19 - Avatar: The Last Airbender: "Sozin's Comet"
Series finales
- July 19 - Avatar: The Last Airbender, three seasons
- September 13 - El Tigre: The Adventures of Manny Rivera
- September 20 - Kappa Mikey
- November 27
- All Grown Up, five seasons
- Zoey 101, four seasons
Movies
Made-for-TV movies
- November 8 - iCarly: iGo to Japan
- December 5 - Merry Christmas, Drake & Josh
DVD releases
Retail releases
- January 29 - SpongeBob SquarePants: To Love a Patty
- February 26 - Are You Afraid of the Dark?: Season 5
- April 15 - SpongeBob SquarePants: Pest of the West
- April 29 - Are You Afraid of the Dark?: Season 6
- June 24 - Tak and the Power of Juju: The Trouble with Magic
- August 19 - Are You Afraid of the Dark?: Season 7
- October 14 - SpongeBob SquarePants: WhoBob WhatPants?
- November 18
- The Fairly OddParents: Season 6, Volume 1
- SpongeBob SquarePants: Season 5, Volume 2
Manufacture-on-demand releases
- August 21
- The Best of Drake & Josh: Seasons 1 & 2
- Hey Arnold!: Season 1
- August 29
- The Best of Drake & Josh: Seasons 3 & 4
- Doug: Season 1
- Doug: Season 2
- Hey Arnold!: Season 2
- September 5
- The Adventures of Jimmy Neutron: The Best of Season 1
- The Adventures of Jimmy Neutron: The Best of Season 2
- The Adventures of Jimmy Neutron: The Best of Season 3
- September 16
- Danny Phantom: Season 1
- Danny Phantom: Season 2
- The Best of Rocko's Modern Life: Volume 1
- The Best of Rocko's Modern Life: Volume 2
- September 23
- Ned's Declassified School Survival Guide: The Best of Season 1
- Ned's Declassified School Survival Guide: The Best of Season 2
- December 19 - Merry Christmas, Drake and Josh
iTunes releases
- January 28 - Kappa Mikey: Season Two
- February 6 - Zoey 101: Season Four
- February 18 - The Fairly OddParents: Season Six
- April 28 - Mighty B: Season One
- June 9 - Yo Gabba Gabba: Season One
- June 16 - Hey Arnold!: Volume One
- June 18 - The Best of Rugrats: Volume One
- July 28
- Aaahh!!! Real Monsters: Season One
- The Best of Clarissa Explains It All: Volume One
- Doug: Season One
- September 15
- The Fairly OddParents: Season Four
- SpongeBob SquarePants: Season Six
- September 27 - iCarly: Volume Two
- November 9 - True Jackson, VP: Season One
Nickelodeon character debuts
- The Fairly OddParents: Poof
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