The Salvadoran Primera División de Fútbol Profesional Apertura 2003 season (officially "Torneo Apertura 2003") started on August 2, 2003. The season was composed of the following clubs: * C.D. FAS * Municipal Limeño * San Salvador F.C. * C.D. Águila * C.D. Luis Ángel Firpo * A.D. Isidro Metapán * C.D. Atlético Balboa * Alianza F.C. * C.D. Arcense * Chalatenango