The King Alfonso XIII's Cup 1925 was the 25th staging of the Copa del Rey, the Spanish football cup competition.
Teams
A record twelve teams were invited to play the tournament, as the champion of Castile and León was also invited, while the Levante Championship was split into two tournaments: the Valencian Championship and the Murcian Championship.
The following eleven teams competed (the entry of Real Murcia, winners of the newly formed Championship of Murcia, was rejected):
Biscay: Arenas Club
Gipuzkoa: Real Sociedad
Centre Region: Athletic Madrid
South Region: Sevilla FC
Galicia: Celta de Vigo
Asturias: Stadium Ovetense
Cantabria: Racing de Santander
Catalonia: FC Barcelona
Aragon: Stadium de Zaragoza
Valencia: Valencia CF
Castile and León: CD Español
Group stage
The winner of each group advanced to the semifinals.
Group I
Group II
Tie-break match
Group III
Group IV
Semifinals
First leg: