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 Spanish 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 Real Madrid CF faced 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 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, were defeated 3–2 by Sporting de Gijón in the round of 16.
Format
| Round | Fixture | Clubs | Gain entry |
| 1st round | 110 | 226 → 116 | All Clubs participating gain entry |
| 2nd round | 56 | 116 → 60 | Real Sociedad, Sporting de Gijón, Atlético de Madrid |
| 3rd round | 28 | 60 → 32 | - |
| 4th round | 14 | 32 → 18 | - |
| 5th round | 2 | 18 → 16 | - |
| Round of 16 | 8 | 16 → 8 | FC Barcelona, Real Madrid CF, Valencia CF |
| Quarter-finals | 4 | 8 → 4 | - |
| Semi-finals | 2 | 4 → 2 | - |
| Final | 1 | 2 → 1 | - |
| Division | No. clubs |
| 1ª División | 18 |
| 2ª División | 20 |
| 2ª División B | 39 |
| 3ª División | 148 |
| Cto. Nacional de Aficionados | 1 |
| Total teams | 226 |
- All rounds are played over two legs except the final which is played a single match in a neutral venue. The team that has the higher aggregate score over the two legs progresses to the next round.
- In case of a tie on aggregate, will play an extra time of 30 minutes, and if still tied, will be decided with a penalty shoot-outs.
- The teams that play European competitions are exempt until the [|round of 16] or when they are removed from the tournament.
- The winners of the competition will earn a place in the group stage of next season's UEFA Cup Winners' Cup, if they have not already qualified for European competition, if so then the runners-up will instead take this berth.
1st round
2nd round
3rd round
4th round
5th round
Bracket
Round of 16
First leg
Second leg
Quarter-finals
First leg
Second leg
Semi-finals
First leg
Second leg
Final
| Copa del Rey 1979–80 winners |
| Real Madrid C.F. 14th title |