| Copa del Rey | |
| Year: | 1983–84 |
| Other Titles: | 82nd Copa del Rey |
| Country: |  Spain |
| Dates: | 7 September 1983 – |
| Num Teams: | 136 |
| Winners: | Athletic Bilbao |
| Second: | FC Barcelona |
| Matches: | 269 |
| Goals: | 751 |
| Prev Season: | 1982–83 |
| Next Season: | 1984–85 |
The 1983–84 Copa del Rey was the 82nd staging of the Spanish Cup, the annual domestic football cup competition in Spain. The tournament was attended by 136 teams from the higher echelons of Spanish football.
The tournament began on 7 September 1983 and ended on 5 May 1984 with the final, held in Santiago Bernabéu Stadium, in Madrid.
FC Barcelona played their second consecutive final but lost to Athletic Bilbao in a match remembered for its incidents, toughness and especially the scuffle at the end. The match was preceded by controversial statements from both sides and with memories of the previous game in which Maradona was seriously injured.[1] Once the game finished, Maradona himself started a fight that ended with all players in a pitched battle.
The match ended with a 1–0 victory for the Basque team. This was their twenty-third win in this competition and was part of their fifth double.
| Round | Fixture | Clubs | Gain entry |
|---|---|---|---|
| First round | 64 | 136 → 72 | All Clubs participating gain entry |
| Second round | 34 | 72 → 38 | Atlético de Madrid, Real Madrid CF, Sevilla FC (*) |
| Third round | 18 | 38 → 20 | |
| Fourth round | 4 | 20 → 16 | Athletic Bilbao (*) |
| Round of 16 | 8 | 16 → 8 | FC Barcelona (*) |
| Quarter-finals | 4 | 8 → 4 | |
| Semi-finals | 2 | 4 → 2 | |
| Final | 1 | 2 → 1 |
| 1ª División | 18 | |
| 2ª División | 20 | |
| 2ª División B | 26 | |
| 3ª División | 72 | |
| Total teams | 136 |
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See main article: 1984 Copa del Rey Final.