The 1990–91 Taça de Portugal was the 52nd edition of the Portuguese football knockout tournament, organized by the Portuguese Football Federation (FPF).
The 1990–91 Taça de Portugal began in September 1990.
[1] The final was played on 2 June 1991 at the Estádio Nacional.
[4] In the final, Porto defeated Beira-Mar 3–1 to claim a seventh Taça de Portugal trophy.
[5] As a result of Porto winning the domestic cup competition, the Portistas faced 1990–91 Primeira Divisão winners Benfica in the 1991 Supertaça Cândido de Oliveira.