The 1991 Taça de Portugal Final was the final match of the 1990–91 Taça de Portugal, the 51st season of the Taça de Portugal, the premier Portuguese football cup competition organized by the Portuguese Football Federation (FPF). The match was played on 2 June 1991 at the Estádio Nacional in Oeiras, and opposed two Primeira Liga sides: Beira-Mar and Porto. Porto defeated Beira-Mar 3–1 in a game that went to extra-time, which would give Porto their seventh Taça de Portugal.