| Turkish Cup | |
| Year: | 1989–90 |
| Other Titles: | Türkiye Kupası |
| Country: | Turkey |
| Num Teams: | 72 |
| Defending Champions: | Beşiktaş |
| Winners: | Beşiktaş (3rd title) |
| Second: | Trabzonspor |
| Matches: | 45 |
| Goals: | 167 |
| Scoring Leader: | Feyyaz Uçar (4 goals) |
| Prev Season: | 1988–89 |
| Next Season: | 1990–91 |
The 1989–90 Turkish Cup was the 28th edition of the annual tournament that determined the association football Süper Lig Turkish Cup (tr|Türkiye Kupası)[1] [2] champion under the auspices of the Turkish Football Federation (tr|Türkiye Futbol Federasyonu; TFF). Beşiktaş successfully contested Trabzonspor 2–0 in the final.
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