1988–89 KNVB Cup
| Tournament details | |
|---|---|
| Country | Netherlands |
| Teams | 64 |
| Defending champions | PSV |
| Final positions | |
| Champions | PSV |
| Runners-up | FC Groningen |
| Tournament statistics | |
| Top goal scorer(s) | Willem van der Ark (6) |
The 1988-89 KNVB Cup was the 71st edition of the Dutch national football annual knockout tournament for the KNVB Cup. 64 teams contested, beginning on 1 October 1988 and ending at the final on 25 May 1989.
PSV beat FC Groningen 4–1 and won the cup for the fifth time.