The National Amateur Cup, also known as the USASA Amateur Cup, is an American knockout soccer competition open to all amateur teams affiliated with the United States Soccer Federation through United States Adult Soccer Association (USASA).

[1] In 1923, the United States Football Association established the National Amateur Cup in response to the growing number of teams entering the open National Challenge Cup.

The 1923 competition was played through the semifinals; however, the tournament was never completed due to inclement weather.

In 1924 Fleisher Yarn was crowned as the first amateur champion in the United States.

While the USSF originally managed the competition, that responsibility is now held by the United States Adult Soccer Association (USASA).