The 1991 Copa Chile-Digeder was the 21st edition of the Chilean Cup tournament. The competition started on March 2, 1991, and concluded on November 13, 1991. Universidad Católica won the competition for their third time, beating Cobreloa 1–0 on the final. The points system used in the first round of the tournament was; 2 points for the winner; and, in case of a tie, each team took 1 point.