| 1988–89 | |
| Country: | Netherlands |
| Num Teams: | 64 |
| Defending Champions: | PSV |
| Winners: | PSV |
| Second: | FC Groningen |
| Scoring Leader: | Willem van der Ark (6) |
| Prev Season: | 1987–88 |
The 71st edition of the KNVB Cup started on October 1, 1988. The final was played on May 25, 1989: PSV beat FC Groningen 4–1 and won the cup for the fifth time.
The matches of the first round were played on October 1 and 2, 1988.
| Home team | Result | Away team | |
|---|---|---|---|
| NSVV A | 1–4 | FC Twente E | |
| VV OVV A | 0–4 | BVV Den Bosch E | |
| Quick Boys A | 1–2 | Fortuna Sittard E | |
| RCH A | 0–5 | Feyenoord E | |
| VV Rheden A | 1–2 | PSV E | |
| Rijnsburgse Boys A | 3–2 | SC Cambuur 1 | |
| ROHDA Raalte A | 1–1 (p) | FC Den Haag 1 | |
| RVVH A | 0–7 | MVV E | |
| SC Enschede A | 0–2 | RBC 1 | |
| SC Heracles 1 | 2–3 | FC Utrecht E | |
| SV Spakenburg A | 3–2 | DS '79 1 | |
| SVV 1 | 0–6 | Ajax E | |
| TOP Oss A | 2–3 (aet) | Veendam E | |
| SV Venray A | 1–2 | PEC Zwolle E | |
| VC Vlissingen A | 2–1 | De Graafschap 1 | |
| VVOG A | 3–1 | Excelsior 1 |
| Home team | Result | Away team | |
|---|---|---|---|
| ACV A | 1–3 (aet) | sc Heerenveen 1 | |
| VV Bennekom A | 1–2 | FC Groningen E | |
| Blauw-Wit A | 1–0 | Go Ahead Eagles 1 | |
| VV de Bataven A | 0–3 | FC Wageningen 1 | |
| De Treffers A | 0–4 | HFC Haarlem E | |
| DHC Delft A | 1–4 | Vitesse Arnhem 1 | |
| DOS Kampen A | 0–4 | AZ 1 | |
| VV DOVO A | 3–5 | VVV E | |
| USV Elinkwijk A | 0–1 | FC Eindhoven 1 | |
| FC Emmen 1 | 2–7 | Willem II E | |
| Enter Vooruit A | 0–3 | FC Volendam E | |
| VV Geldrop/AEK A | 2–5 | Roda JC E | |
| Helmond Sport 1 | 2–0 | NEC 1 | |
| IJsselmeervogels A | 0–2 | RKC Waalwijk E | |
| TSV Longa A | 1–4 | Sparta E | |
| NAC Breda 1 | 0–0 (p) | Telstar 1 |
E Eredivisie; 1 Eerste Divisie; A Amateur teams
The matches of the second round were played on November 18, 19 and 20, 1988.
| Home team | Result | Away team | |
|---|---|---|---|
| PSV | 2–1 | FC Volendam | |
| Rijnsburgse Boys | 2–4 | Willem II | |
| RKC Waalwijk | 1–6 | Feyenoord | |
| SV Spakenburg | 1–4 | AZ | |
| VC Vlissingen | 2–0 | BVV Den Bosch | |
| VVOG | 3–1 (aet) | Helmond Sport | |
| VVV | 3–4 (aet) | FC Groningen | |
| FC Wageningen | 1–5 | Vitesse Arnhem |
| Home team | Result | Away team | |
|---|---|---|---|
| Ajax | 4–1 | PEC Zwolle | |
| Blauw-Wit | 1–3 | Sparta | |
| FC Eindhoven | 2–3 (aet) | Telstar | |
| FC Den Haag | 1–0 | Roda JC | |
| FC Twente | 1–0 | Veendam | |
| FC Utrecht | 5–0 | RBC | |
| Fortuna Sittard | (p) 1-1 | HFC Haarlem | |
| MVV | 1–3 | sc Heerenveen |
The matches of the round of 16 were played between February 1 and 15, 1989.
| Home team | Result | Away team | |
|---|---|---|---|
| Ajax | 2–1 | FC Utrecht | |
| AZ | 2–1 | Fortuna Sittard | |
| FC Den Haag | 3–2 | Sparta | |
| Feyenoord | 0–2 | Willem II | |
| PSV | 2–0 | FC Twente | |
| Telstar | 0–2 (aet) | VC Vlissingen | |
| Vitesse Arnhem | 1–0 | sc Heerenveen | |
| VVOG | 0–1 | FC Groningen |
The quarter finals were played between March 8 and March 15, 1989.
| Home team | Result | Away team | |
|---|---|---|---|
| VC Vlissingen | 0–3 | FC Den Haag (on Feb. 19) | |
| AZ | 0–2 | PSV | |
| FC Groningen | 3–0 | Ajax | |
| Willem II | (p) 1-1 | Vitesse Arnhem |
The semi-finals were played on April 12, 1989.
| Home team | Result | Away team | |
|---|---|---|---|
| FC Groningen | 5–1 | Willem II | |
| PSV | 5–2 | FC Den Haag |
PSV also won the Dutch Eredivisie championship, thereby taking the double. They would participate in the European Cup, so finalists FC Groningen could play in the Cup Winners' Cup.