| Country |
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|---|---|---|---|
| Champions |
Levski Sofia (17th cup) |
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| Runners-up | Botev Plovdiv | ||
| Top goal scorer(s) |
Petar Mihtarski (Levski) (7 goals) |
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The 1990–91 Bulgarian Cup was the 51st season of the Bulgarian Cup. Levski Sofia won the competition, beating Botev Plovdiv 2–1 in the final at the Ivaylo Stadium in Veliko Tarnovo.
In this round entered winners from the preliminary rounds together with the teams from B Group.
This round featured winners from the First Round and all 16 teams from A Group.