| National Amateur Cup | |
| Year: | 1973 |
| Country: |  United States |
| Date: | --> |
| Num Teams: | 31 |
| Defending Champions: | St. Louis Busch S.C. |
| Winners: | Philadelphia Inter |
| Count: | 1 |
| Second: | San Jose Grenadiers |
| Semifinal1: | Chicago Kickers |
| Semifinal2: | Peabody Academica |
| Prev Season: | 1972 |
| Next Season: | 1974 |
The 1973 National Amateur Cup was the 49th annual edition of the national tournament open to amateur soccer teams affiliated with the United States Soccer Football Association.
Philadelphia Inter defeated the San Jose Grenadiers, 3–0, in the final.[1]