The 1990–91 Turkish Cup was the 29h edition of the tournament that determined the association football Süper Lig Turkish Cup (Turkish: Türkiye Kupası)[2] champion under the auspices of the Turkish Football Federation (Turkish: Türkiye Futbol Federasyonu; TFF).
champion under the auspices of the Turkish Football Federation (Turkish: Türkiye Futbol Federasyonu; TFF).
Trabzonspor successfully contested Bursaspor on both legs of the finals.
The results of the tournament also determined which clubs would be promoted or relegated.