The 1990–91 Cupa României was the 53rd edition of Romania's most prestigious football cup competition.
The title was won by Universitatea Craiova against FC Bacău.
First round proper matches are played on the ground of the lowest ranked team, then from the second round proper the matches are played on a neutral location.
If a match is drawn after 90 minutes, the game goes in extra time, if the scored is still tight after 120 minutes, then the winner will be established at penalty kicks.
From the first edition, the teams from Divizia A entered in competition in sixteen finals, rule which remained until today.