| Country | Spain | ||
|---|---|---|---|
| Teams | 86 | ||
| Champions | Club Atlético de Madrid | ||
| Runners-up | RCD Mallorca | ||
| Matches played | 169 | ||
| Goals scored | 464 (2.75 per match) | ||
| 
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The 1990–91 Copa del Rey is the 89th staging of the Spanish Cup. The competition began on September 5, 1990, and ended on June 29, 1991, with the final.