1990–91 Slovenian Republic Cup
The 1990–91 Slovenian Republic Cup was the last season of Slovenia's football knockout competition before the establishment of the Slovenian Football Cup. It was contested by all Slovenian clubs except Olimpija, with Yugoslav Inter-Republic League members joining in the round of 16. From there on clubs played by the East/West system to the final.East
West
| Home team | Score | Away team |
| Ljubljana | 0–0
6–7 | Koper |
| Izola | 9–0 | Mavčiče |
| Živila Naklo | 3–0 | Lj. sodniki |
| Primorje | 0–2 | Jadran/Lama Dekani |
Quarter-finals
East
| Home team | Score | Away team |
| Kovinar Maribor | 1–1
2–4 | Beltnika |
| Središče | 1–2 | Rudar Velenje |
West
| Home team | Score | Away team |
| Jadran/Lama Dekani | 3–3
6–5 | Izola |
| Koper | 3–0 | Živila Naklo |
Semi-finals
East
| Home team | Score | Away team |
| Beltnika | 1–1
1–4 | Rudar Velenje |
West
| Home team | Score | Away team |
| Koper | 2–1 | Jadran/Lama Dekani |
Final
