1991 U.S. Open Cup

The 1991 United States Open Cup was the 78th edition of the soccer tournament to crown the national champion of the United States.
The Brooklyn Italians won the cup 1–0 against the Richardson Rockets of Texas in a match played at Brooklyn College in Brooklyn, New York.

Bracket

Regional semifinals

I Cambridge Faialense SC 1-3 Brooklyn Italians
I Fairfax Spartans 5-0 Vereinigung Erzgebirge
II RWB Adria W-L Fort Wayne SC
II Madison 56ers 1-0 St. Louis Scott Gallagher
III Richardson Rockets 2-0 Atlanta Datagraphic
III Galveston NASA 2-0 Wichita Falls Fever
IV Strikers 4-3 Fatigue Tech
IV New Mexico Chiles 2-0 San Jose Oaks

Regional Finals

I Brooklyn Italians 3-0 Fairfax Spartans
II Madison 56ers 4-4 RWB Adria RWB advance 7-6 PK's
III Richardson Rockets 8-2 FC Galveston NASA
IV New Mexico Chiles 5-0 Strikers

Semifinals

Richardson Rockets 1-0 New Mexico Chiles
RWB Adria 1-0 Brooklyn Italians RWB disqualified for using players not registered with the USSF. Brooklyn awarded match after protest.