Los Nickelodeon's Kids Choice Awards 2003 fueron la 16.ª entrega de los Nickelodeon's Kids Choice Awards que se realizaron en Los Ángeles, California. Fue conducido por Rosie O'Donnell quien sería la última vez en conducir un KCA.. The award show was held in the Barker Hangar at the Santa Monica Airport in Santa Monica, California. This was the last time O'Donnell would host the awards. By that time she has hosted the awards seven times in a row. The announcers were Daran Norris and Susanne Blakeslee from The Fairly OddParents who used their Cosmo and Wanda voices, respectively, for the event.

• Película favorita:
  • Austin Powers in Goldmember
  • Harry Potter y la cámara secreta
  • Ice Age
  • El Señor de los Anillos: las dos torres

• Actor favorito:
  • Adam Sandler (Mr. Deeds)
  • Jackie Chan (The Tuxedo)
  • Mike Myers (Austin Powers in Goldmember)
  • Will Smith (Hombres de negro II)

• Actriz favorita:
  • Halle Berry (Die Another Day)
  • Amanda Bynes (Big Fat Liar)
  • Kirsten Dunst (Spider-Man)
  • Jennifer López (Maid in Manhattan)

• Voz favorita para película animada:
  • Matt Damon (Spirit: El corcel indomable)
  • Denis Leary (Ice Age)
  • Ray Romano (Ice Age)
  • Adam Sandler (8 Noches de Locura)

• Hombre favorito Buttkicker:
  • Jackie Chan (The Tuxedo)
  • Dwayne Johnson (El Rey Escorpión)
  • Tobey Maguire (Spider-Man)
  • Elijah Wood (El Señor de los Anillos: las dos torres)

• Mujer favorita Butt Kicker:
  • Halle Berry (Die Another Day)
  • Sarah Michelle Gellar (Buffy the Vampire Slayer)
  • Beyoncé Knowles (Austin Powers in Goldmember)
  • Jennifer Love Hewitt (The Tuxedo)

• Grupo favorito:

B2K

• Cantante femenina:

Ashanti

• Cantante masculino:

Nelly

• Banda favorita:

No Doubt

• Canción favorita:

Sk8er Boi (Avril Lavigne)

• Programa de TV:
  • 7th Heaven
  • All That
  • Friends
  • Lizzie McGuire

• Actriz de TV:
  • Jennifer Aniston (Friends)
  • Amanda Bynes (The Amanda Show; What I Like About You)
  • Hilary Duff (Lizzie McGuire)
  • Melissa Joan Hart (Sabrina, the Teenage Witch)

• Actor de TV:
  • Nick Cannon (The Nick Cannon Show)
  • Adam Lamberg (Lizzie McGuire)
  • Bernie Mac (The Bernie Mac Show)
  • Frankie Muniz (Malcolm in the Middle)

• Wannabe Award:

Will Smith

• Caricatura favorita:

Bob Esponja

• Favorite Book:

A Series of Unfortunate Events series

• Athleta femenina:

Michele Kwon

• Athleta masculino:

Tony Hawk

• Equipo favorito:

Los Angeles Lakers

• Videojuego favorito:

SpongeBob Squarepants: Revenge of the Flying Dutchman

• Erupto:

Justin Timberlake