The 1989–90 Turkish Cup was the 28th edition of the annual tournament that determined the association football Süper Lig Turkish Cup () champion under the auspices of the Turkish Football Federation (; TFF). Beşiktaş successfully contested Trabzonspor 2–0 in the final.
First round
Second round
Third round
Fourth round
Fifth round
Quarter-finals
Semi-finals Summary table
Matches
Final
References