Regional Semifinals

• I Cambridge Faialense SC (MA) 1-3 Brooklyn Italians (NY)
• I Fairfax Spartans (VA) 5-0 Vereinigung Erzgebirge (PA)
• II RWB Adria (IL) W-L Fort Wayne SC (IN)
• II Madison 56ers (WI) 1-0 St. Louis Scott Gallagher (MO)
• III Richardson Rockets (TX) 2-0 Atlanta Datagraphic
  Atlanta Datagraphic
  Atlanta Datagraphic was an amateur U.S. soccer club sponsored by the Datagraphic firm of Atlanta, Georgia. It won the 1979 National Amateur Cup.-History:...
  
   (GA)
• III Galveston NASA (TX) 2-0 Wichita Falls Fever (KS)
• IV Strikers (CA) 4-3 Fatigue Tech (WA)
• IV New Mexico Chiles (NM) 2-0 San Jose Oaks (CA)

Regional Finals

• I Brooklyn Italians (NY) 3-0 Fairfax Spartans (VA)
• II Madison 56ers (WI) 4-4 RWB Adria (IL) RWB advance 7-6 PK's
• III Richardson Rockets (TX) 8-2 FC Galveston NASA (TX)
• IV New Mexico Chiles (NM) 5-0 Strikers (CA)

Semifinals

• Richardson Rockets 1-0 New Mexico Chiles
• RWB Adria 1-0 Brooklyn Italians RWB disqualified for using players not registered with the USSF
  United States Soccer Federation
  The United States Soccer Federation is the official governing body of the sport of soccer in the United States. Its headquarters are located in Chicago, Illinois. It is a member of FIFA and is responsible for governing amateur and professional soccer, including the men's, women's, youth, futsal...
  
  . Brooklyn awarded match after protest.

Championship

External links

• 1991 U.S.Open Cup results