The King Alfonso XIII's Cup 1925 was the 25th staging of the Copa del Rey, the Spanish football cup competition.
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):
The winner of each group advanced to the semifinals.
First leg: