2003

This is a list of notable events, premieres, releases, series cancellations and endings, and other business ventures for Nickelodeon in the year 2003.

Shows

Series premieres

• April 12 - All Grown Up! premieres as the Kids' Choice Awards leadout; though the series would officially premiere in November.
• August 1 - My Life as a Teenage Robot
• September 13 - Romeo!

Season premieres

• February 3 - The Wild Thornberrys season 5 (final)
• May 30 - ChalkZone season 2
• August 9 - As Told by Ginger season 3 (final)
• August 30 - All That season 9
• September 19 - The Adventures of Jimmy Neutron: Boy Genius season 2

Specials

• The Adventures of Jimmy Neutron: "The Eggpire Strikes Back"
• October - The Adventures of Jimmy Neutron: "Rescue Jet Fusion"

Movies

Theatrical

• Rugrats Go Wild!

Made-for-TV

• Maniac Magee
• July 12 - The Fairly OddParents: Abra-Catastrophe!
• February 3 - The Electric Piper

Comics

• The Rugrats comic strip is cancelled

Video games

• November 3 - The Fairly OddParents: Breakin' Da Rules
• November 10 - SpongeBob SquarePants: Battle for Bikini Bottom

Albums

• February 4 - ChalkZone: In the Zone

Books

• January
  • Battle of the Band
  • Chew on This!
  • Genius 101 : Exploring My World
  • Jimmy on Ice
  • SpongeBob JokePants
  • The Time Pincher
  • A Valentine for Tommy
• February - A Pickles Passover
• May
  • Chasing Dad
  • Rugrats Go Wild! (novelization)
• June
  • Hands Off!
  • The Amazing SpongeBobini
• July
  • Goddard, Come Home!
  • No More Mr. Smart Guy
• August 1 - Scrambled Planets!
• September
  • The Big Halloween Scare
  • Canine Catastrophe!
  • New Student Starfish
  • Rugrats' Favorite Funnies
  • Scavenger Hunt
  • Special Delivery!
  • SpongeBob AirPants: The Lost Episode
  • SpongeBob MoviePants
  • Token Wishes
• October
  • The Big Sweep (Rocket Power Ready-To-Read)
  • Christmas in the City
  • Fearless
  • The Runaway Turkey
  • The Science Project
  • SpongeBob's Christmas Wish
• November
  • Llama Drama
  • Sky Scare
  • Holly Jolly Jimmy
• December
  • Best in Show
  • Ding Dong
• December 23
  • Reggie's Secret Admirer
  • SpongeBob's Secret Valentine

Home video releases

VHS

• January 28
  • Rugrats Mysteries
  • SpongeBob SquarePants: Bikini Bottom Bash
  • SpongeBob SquarePants: Deep Sea Sillies
• February 4 - Blue's Clues: Blue's Big Band
• March 4
  • Nickelodeon: Nickstravaganza!
  • Blue's Clues: 100th Episode Celebration
  • SpongeBob SquarePants: Anchors Away
  • SpongeBob SquarePants: The Sponge Who Could Fly
• April 1 - The Wild Thornberrys Movie
• May 27
  • The Adventures of Jimmy Neutron: Time Warp
  • The Adventures of Jimmy Neutron: When Pants Attack
• June 3
  • Dora the Explorer: City of Lost Toys
  • Blue's Clues: Shapes and Colors
• July 15 - The Fairly OddParents: Abra-Catastrophe!
• July 29
  • SpongeBob SquarePants: Laugh Your Pants Off
  • SpongeBob SquarePants: Sponge-a-Rama
• August 26
  • All Grown Up: Growing Up Changes Everything
  • Blue's Clues: Blue Takes You to School
• September 30
  • SpongeBob SquarePants: Christmas
  • Blue's Clues: Blue's First Holiday
• October 7 - The Adventures of Jimmy Neutron: Sea of Trouble
• December 16 - Rugrats Go Wild!

DVD

• January 28
  • Rugrats Mysteries
  • SpongeBob SquarePants: Tales from the Deep
• February 4 - Blue's Clues: Blue's Big Band
• March 4 - SpongeBob SquarePants: Lost at Sea
• April 1 - The Wild Thornberrys Movie
• May 27
  • The Adventures of Jimmy Neutron: Confusion Fusion
  • Harriet the Spy
  • Good Burger
• June 3
  • Dora the Explorer: City of Lost Toys
  • Blue's Clues: Shapes and Colors
• July 15 - The Fairly OddParents: Abra-Catastrophe!
• July 29 - SpongeBob SquarePants: Tide and Seek
• August 26
  • All Grown Up: Growing Up Changes Everything
  • NickToons Halloween
  • Blue's Clues: Blue Takes You to School
• September 15 - The Best of Ren & Stimpy
• September 30
  • NickToons Christmas
  • SpongeBob SquarePants: Christmas
  • Blue's Clues: Blue's First Holiday
• October 7 - The Adventures of Jimmy Neutron: Sea of Trouble
• October 28 - SpongeBob SquarePants: The Complete 1st Season
• December 16 - Rugrats Go Wild!

Events

• April 11 - Jimmy Neutron's Nicktoon Blast opens at Universal Studios Florida