| Copa del Rey | |
| Year: | 1920 |
| Other Titles: | 20th Copa del Rey |
| Country: |  Spain |
| Defending Champions: | Arenas Club de Getxo |
| Winners: | FC Barcelona (4th title) |
| Second: | Athletic de Bilbao |
| Matches: | 9 |
| Goals: | 27 |
| Prev Season: | 1919 |
| Next Season: | 1921 |
The Copa del Rey 1920 was the 20th staging of the Copa del Rey, the Spanish football cup competition.
The competition started in March 1920 and concluded on May 2, 1920, with the Final, held at El Molinón in Gijon, in which FC Barcelona lifted the trophy for the fourth time with a 2–0 victory over Athletic Bilbao.
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Athletic de Bilbao qualified for the semifinals.----Real Vigo qualified for the semifinals.
Byes: Real Unión, FC Barcelona (drawn against Sevilla FC, who withdrew after their proposal to play both legs in Madrid was rejected).
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FC Barcelona qualified for the final.----Athletic de Bilbao qualified for the final.
See main article: article and 1920 Copa del Rey Final.