1990–91 KNVB Cup
| Tournament details | |
|---|---|
| Country | Netherlands |
| Teams | 67 |
| Defending champions | PSV |
| Final positions | |
| Champions | Feyenoord |
| Runners-up | BVV Den Bosch |
| Tournament statistics | |
| Top goal scorer(s) | Romario (5 goals) |
The 1990-91 KNVB Cup was the 73rd edition of the Dutch national football annual knockout tournament for the KNVB Cup. 67 teams contested, beginning on 13 October 1990 and ending at the final on 2 June 1991.
Feyenoord beat BVV Den Bosch 1–0 and won the cup for the seventh time.