2003 Primera División of Chile

The 2003 Primera División de Chile season was both 73rd and 74th season of top-flight football in Chile.

Torneo Apertura
The 2003 Campeonato Nacional Apertura Copa Banco del Estado was the 73rd Chilean League top flight tournament, in which Cobreloa won its sixth league title after eight years.

Aggregate table
Repechaje

Torneo Clausura
The 2003 Campeonato Nacional Clausura Copa Banco del Estado was the 74th Chilean League top flight tournament, in which Cobreloa won its seventh league title after beating Colo-Colo in the finals.