1990–91 Bulgarian Cup
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.
First round
In this round entered winners from the preliminary rounds together with the teams from B Group.!colspan=5 style="background-color:#D0F0C0;" |'''28 November / 5 December 1990'''
Second round
This round featured winners from the First Round and all 16 teams from A Group.!colspan=5 style="background-color:#D0F0C0;" |'''9 / 16 December 1990'''
Group stage
Group 1
;Matches were played in Petrich and Sandanski!colspan=3 style="background-color:#D0F0C0;" |10 February 1991
!colspan=3 style="background-color:#D0F0C0;" |13 February 1991
!colspan=3 style="background-color:#D0F0C0;" |'''16 February 1991'''
Group 2
;Matches were played in Nesebar, Balgarovo, Dolno Ezerovo and Pomorie!colspan=3 style="background-color:#D0F0C0;" |10 February 1991
!colspan=3 style="background-color:#D0F0C0;" |13 February 1991
!colspan=3 style="background-color:#D0F0C0;" |'''16 February 1991'''
Group 3
;Matches were played in Banya and Kazanlak!colspan=3 style="background-color:#D0F0C0;" |10 February 1991
!colspan=3 style="background-color:#D0F0C0;" |13 February 1991
!colspan=3 style="background-color:#D0F0C0;" |'''16 February 1991'''
Group 4
;Matches were played in Sliven and Yambol!colspan=3 style="background-color:#D0F0C0;" |10 February 1991
!colspan=3 style="background-color:#D0F0C0;" |13 February 1991
!colspan=3 style="background-color:#D0F0C0;" |'''16 February 1991'''