The 1890–91 American Cup was the seventh edition of the soccer tournament organized by the American Football Association. The Fall River East Ends won their first title, keeping the title in Fall River for the fourth year running. Fall River Olympic won the title in 1890 and Fall River Rovers won in 1888 and 1889. The Fall River Rovers were readmitted to the AFA after having settled their dispute with the Pawtucket Free Wanderers, before which any associations teams were barred from playing them.
Participants Joining this season were British Hosiery, Cumberland Rangers, Holyoke Rangers, Lowell Thistle, New Rochelle, and Nonpareils. Not returning from last season were Lonsdale, Paterson FC, Providence Athletic, and Trenton FC.
StateCityTeamMassachusettsHolyokeHolyoke RangersLowellLowell ThistleFall RiverFall River East EndsFall River OlympicsFall River RoversNew JerseyNewarkClark O.N.T.Newark CaledonianKearnyKearny RangersNew YorkBrooklynLongfellowsNonpareilsNew RochelleNew Rochelle FCNew YorkThistleRhode IslandCumberlandCumberland RangersPawtucketPawtucket Free WanderersThorntonBritish Hosiery
Round 1 The drawing for round one took place on Saturday September 20. Caledonian drew a bye to Round 2. Matches to be played on or before October 18.
Eastern District
Western District
Replay
Round 2 The drawing for round two took place on Saturday October 25, matches to be played within the next six weeks.
Eastern District
Western District
Round 3 Round 3 matches were arranged at a meeting on Saturday December 20. Nonpareil to play Longfellows and Fall River East Ends to play Fall River Rovers, on or before the First Saturday in March. Eastern District
Western District
Replay
Final
American Cup bracket
Notes;
References