The 1923 National Amateur Cup was the USFA's first attempt to stage a national knockout competition strictly for amateur soccer teams. This edition however did not reach a conclusion and no overall winner was crowned. The tournament suffered numerous delays. Among the worst instances was an early round game between Swedish Americans of Chicago and Gary, Indiana scheduled for mid December. Poor field conditions due to bad weather prevented the completion of their matchup until the end of March. Consequently no national final or semifinals were played. Ten years prior, the USFA's earlier incarnation, the AAFA, had conducted two tournaments on the amateur level. Both were successful in the sense that they were completed expeditiously however they were able to draw few if any teams from beyond the New York area. The 1923 amateur tournament drew 68 teams ranging from Chicago, Illinois to Rumford, Maine including even a team from Ontario, Canada. The 'finals' in the brackets below represent the national quarterfinal round with the district winners in bold.
New England
| Quarterfinals | | Semifinals | | Finals |
| | | | | | | | | | |
| | | | | | |
|
| Danersk | |
| March 30 |
| Ansonia | | |
| Ansonia | 10 |
| |
| | Taftville | 0
| |
| Manchester Olympic | |
| | June 24 - Ansonia |
| Taftville | | |
| Ansonia | 1 |
| April 7 |
| | Roxbury | 2
|
| Roxbury | 7 |
| | |
| Charlestown | 0
| |
| Roxbury | |
| March 31 |
| | Abbott Worsted Junior | | |
| Abbott Worsted Junior | 2 |
| |
| Boston St. George | 0
| |
|
NY-NJ-East PA
| Quarterfinals | | Semifinals | | Finals |
| | | | | | | | | | |
| | | | | | |
|
| Fleisher Yarn | 2 |
| |
| Fairhill | 0
| |
| Fleisher Yarn | 2 |
| |
| | 26th Ward | 0
| |
| | |
| | |
| | | |
| Fleisher Yarn | 4 |
| May 27 |
| | American AA | 2
|
| Tyrconnell Celtic | 0 |
| June 4 - Clifton | |
| American AA | 1
| |
| American AA | 3 |
| May 20 |
| | Brooklyn St. George | 1
| |
| Brooklyn St. George | 3 |
| |
| British Great War Veterans | 0
| |
|
Ohio-West PA
| Quarterfinals | | Semifinals | | Finals |
| | | | | | | | | | |
| December 23 | | | | | |
|
| Jeannette | |
| January 7 |
| Ulster | | |
| Jeannette | |
| December 23 |
| | Atlasburg | | |
| Atlasburg | |
| | February 24 - Jeannette |
| Pittsburgh Rovers | | |
| Jeannette | 1 |
| January 7 |
| | White Auto | 0
|
| Goodyear | |
| January 21 - Akron | |
| Clan MacKenzie | | |
| Goodyear | 0 |
| |
| | White Auto | 2
| |
| White Auto | |
| |
| Kenmoore | | |
|
Illinois-Michigan
| Quarterfinals | | Semifinals | | Finals |
| | | | | | | | | | |
| | | | | | |
|
| Detroit FC | |
| |
| Ulster AFC | | |
| Detroit FC | |
| |
| | | | |
| Royal Oak | |
| | June 24 - Detroit |
| Liberty | | |
| Detroit FC | 2 |
| March 25 |
| | Swedish American | 3
|
| Swedish American | 8 |
| | |
| Gary | 0
| |
| Swedish American | |
| |
| | Harvey | | |
| Harvey F.C. | |
| |
| bye | | |
|