The 2003 Copa del Rey Juvenil was the 53rd staging of the tournament. The competition began on May 18, 2003, and ended on June 29, 2003, with the final.

First round

Quarterfinals

Semifinals

Final

Espanyol: GK Tato Burgada DF Toni Lao DF Carlos GarcíaDF Albert Serrán DF Javi ChicaMF Enric Maureta MF Joan Tomàs MF Héctor Simón FW Albert Yagüe FW Siscu Cabello MF Iray Barreto Substitutes:FW Luis Valladar MF Pablo Rey-Cabarcos MF Miki Martínez DF Miquel Robusté Manager: Ángel PedrazaMallorca: GK Miguel Ángel MoyàDF Iván MerinoDF Abel MorenoDF Iván Ramis DF José RodríguezMF Javi MorenoMF Xisco Cladera MF César Collado FW Víctor CasadesúsMF Andrés FW Chus Seco Substitutes:FW Guillem Bauzà FW Raúl DF Baltasar Rigo MF Babiloni Manager: Toni Cazorla

Copa del GeneralísimoWinnersEspanyol

See also 2024 Copa del Rey Juvenil (final played between same teams)