The 1990–91 Copa México is the 63rd staging of the Copa México, the 36th staging in the professional era.
The competition started on August 22, 1990, and concluded on January 23, 1991, with the final, in which U. de G. lifted the trophy for first time ever with a 1–0 victory over América.
This edition was played by 20 teams, first with a group stage and later a knock-out stage.
Group stage Group 1
Results
Group 2
Results
Group 3
Results
Group 4
Results
Final stage
Semifinals
First leg
Second leg
U. de G. advanced to final aggregate 4-1
Club América advanced to final aggregate 6-1
Final
First leg
Second leg
U. de G. Won the cup aggregate 3-2
References Mexico - Statistics of Copa México for the 1990–91 season. (RSSSF)