1979–80 Copa del Rey

The 1979–80 Copa del Rey was the 78th staging of the Spanish Cup, the annual domestic cup competition in the Spanish football. The tournament was attended by 226 teams from the main categories of Spaniard football.

The tournament began on 11 September 1979 and ended on 4 June 1980 with the final, held in Santiago Bernabéu Stadium in Madrid.

The final was an unusual event as they faced Real Madrid CF and their reserve team Castilla CF. The final score was 6-1 with Real Madrid getting their fourteenth title and avenging their loss in the final last year. This win added to the league title gave the doublet (third in their history) and Castilla CF qualified directly for the next edition of the UEFA Cup Winners' Cup.

The revelation of the tournament Castilla CF, became the third team from the second division to reach the final.

The defending champions, Valencia CF, was defeated 3-2 (on the aggregate score) by Sporting de Gijón in the Round of 16.