Debutants
Antonio Bucciero is the youngest debutant in La Vuelta ciclista a España in 2003. There are 58 debutants.
| # | Rider | Team | Age |
|---|---|---|---|
| 1 | BUCCIERO Antonio | Saeco | 21y + 130d |
| 2 | LÓPEZ David | Labarca-2-Café Baqué | 22y + 116d |
| 3 | DE LA FUENTE David | Vini Calderola - So.di | 22y + 125d |
| 4 | SINKEWITZ Patrik | Quickstep - Davitamon | 22y + 321d |
| 5 | BOONEN Tom | Quickstep - Davitamon | 22y + 326d |
| 6 | GUTIERREZ Francisco | Labarca-2-Café Baqué | 23y + 95d |
| 7 | SCHLECK Fränk | Team CSC | 23y + 144d |
| 8 | HIEKMANN Torsten | Team Telekom | 23y + 173d |
| 9 | MASCIARELLI Simone | Vini Calderola - So.di | 23y + 247d |
| 10 | SCARPONI Michele | Domina Vacanze - Elitron | 23y + 346d |
| 11 | WERNER Christian | Team Telekom | 24y + 70d |
| 12 | CHEULA Giampaolo | Vini Calderola - So.di | 24y + 106d |
| 13 | RODRÍGUEZ Joaquim | O.N.C.E. - Eroski | 24y + 117d |
| 14 | BERTOGLIATI Rubens | Lampre | 24y + 120d |
| 15 | MARTÍNEZ José Luis | Paternina - Costa de Almería | 24y + 132d |
| 16 | MUTSAARS Ronald | Rabobank ProTeam | 24y + 140d |
| 17 | BRUUN ERIKSEN Thomas | Team CSC | 24y + 205d |
| 18 | BONOMI Giosuè | Saeco | 24y + 320d |
| 19 | PEREZ Sergio | Labarca-2-Café Baqué | 25y + 22d |
| 20 | FRATTINI Davide | Alessio | 25y + 31d |
| 21 | ZABALLA Constantino | Kelme - Costa Blanca | 25y + 114d |
| 22 | HAYMAN Mathew | Rabobank ProTeam | 25y + 139d |
| 23 | GAVAZZI Nicola | Saeco | 25y + 169d |
| 24 | PEPOLI Cristian | Saeco | 25y + 178d |
| 25 | NOZAL Isidro | O.N.C.E. - Eroski | 25y + 323d |
| 26 | CORTINOVIS Alessandro | Lampre | 25y + 330d |
| 27 | GONZÁLEZ Gorka | Euskaltel - Euskadi | 25y + 343d |
| 28 | USOV Alexandre | Phonak Hearing Systems | 26y + 10d |
| 29 | PÉREZ Santiago | Phonak Hearing Systems | 26y + 32d |
| 30 | ISASI Iñaki | Euskaltel - Euskadi | 26y + 139d |
| 31 | ARRIZABALAGA Gorka | Euskaltel - Euskadi | 26y + 145d |
| 32 | LOPEBOSELLI Angelo | Cofidis | 26y + 149d |
| 33 | LARA Francisco José | Team Bianchi | 26y + 193d |
| 34 | EVANS Cadel | Team Telekom | 26y + 204d |
| 35 | CALVENTE Manuel | Team CSC | 27y + 23d |
| 36 | LÓPEZ Joaquin | Paternina - Costa de Almería | 27y + 113d |
| 37 | MONTGOMERY Sven | Fassa Bortolo | 27y + 119d |
| 38 | RIGHI Daniele | Lampre | 27y + 162d |
| 39 | RUND Thorsten | Team Bianchi | 27y + 193d |
| 40 | LUNGHI Denis | Alessio | 27y + 228d |
| 41 | LANDIS Floyd | US Postal Service p/b Berry Floor | 27y + 327d |
| 42 | VILA Francisco Javier | Lampre | 27y + 330d |
| 43 | JUFRÉ Josep | Relax - Fuenlabrada | 28y + 32d |
| 44 | MASON Oscar | Vini Calderola - So.di | 28y + 104d |
| 45 | SØRENSEN Nicki | Team CSC | 28y + 115d |
| 46 | HERRERO Ivan | Labarca-2-Café Baqué | 29y + 31d |
| 47 | SIRONI Gianluca | Vini Calderola - So.di | 29y + 70d |
| 48 | NAVAS David | Relax - Fuenlabrada | 29y + 88d |
| 49 | RASMUSSEN Michael | Rabobank ProTeam | 29y + 97d |
| 50 | TOSATTO Matteo | Fassa Bortolo | 29y + 115d |
| 51 | CARDOSO Pedro | Milaneza - Mss | 29y + 147d |
| 52 | LATASA David | Kelme - Costa Blanca | 29y + 204d |
| 53 | OTERO Gustavo Miguel | Labarca-2-Café Baqué | 29y + 331d |
| 54 | CHRISTENSEN Bekim leif | Team CSC | 29y + 354d |
| 55 | RODRIGUEZ Fred | Vini Calderola - So.di | 30y + 3d |
| 56 | MONDINI Gianpaolo | Domina Vacanze - Elitron | 31y + 53d |
| 57 | SÁNCHEZ Domingo José | Paternina - Costa de Almería | 32y + 298d |
| 58 | SANDSTØD Michael | Team CSC | 35y + 75d |