2003 in UFC

The year 2003 was the 11th year in the history of the Ultimate Fighting Championship (UFC), a mixed martial arts promotion based in the United States. In 2003, the UFC held five events beginning with UFC 41: Onslaught.

Debut UFC fighters
The following fighters fought their first UFC fight in 2003:


 * Chris Liguori
 * Dave Strasser
 * David Loiseau
 * Duane Ludwig
 * Eddie Ruiz
 * Edwin Dewees
 * Falaniko Vitale
 * Frank Trigg


 * Gerald Strebendt
 * Hermes Franca
 * Jeremy Jackson
 * Jorge Rivera
 * Josh Thomson
 * Karo Parisyan
 * Marvin Eastman
 * Nick Agallar


 * Nick Diaz
 * Rich Clementi
 * Rich Crunkilton
 * Rich Franklin
 * Romie Aram
 * Sean Alvarez
 * Vernon White
 * Wes Sims