| Copa del Rey | |
| Year: | 1986–87 |
| Other Titles: | 85th Copa del Rey |
| Country: |  Spain |
| Num Teams: | 141 |
| Defending Champions: | Real Zaragoza |
| Winners: | Real Sociedad (1st title)[1] [2] |
| Second: | Atlético Madrid |
| Prev Season: | 1985–86 |
| Next Season: | 1987–88 |
The 1986–87 Copa del Rey was the 85th staging of the Copa del Rey. The winners, Real Sociedad, qualified for the 1987–88 European Cup Winners' Cup. The competition began on 17 September 1986 and concluded on 27 June 1987 with the final.
17 September 1986
Bye: San Sebastián CF, Valladolid Promesas, Atlético Astorga CF, Mallorca Atlético, CD Roquetas, UE Lleida, CD Olímpic de Xàtiva, Cartagena FC, CD Rayo Cantabria
1 October 1986
Bye: Bilbao Athletic, Atlético Baleares, Atlético Marbella, UD Montijo, Real Balompédica Linense, Deportivo de La Coruña, UP Langreo.
|}
|}
|}
See main article: article and 1987 Copa del Rey Final.