Football SA Federation Cup

The Football South Australia Federation Cup, more commonly known as the Federation Cup and referred to as the Australia Cup South Australian preliminary rounds until the semi-finals, is an annual knockout cup competition in South Australia, run by the state's governing body, Football South Australia. The competition is the second longest-running cup competition in the country, only behind the Football West State Cup, first contested eight years earlier. The competition includes all clubs from the top three tiers of South Australian soccer, as well as numerous clubs from level four and outside the pyramid.

Since 2014, the Federation Cup has been incorporated as one of the qualification tournaments to determine participants in the national Australia Cup. Initially, only the winner would qualify, but since 2020, both finalists advance. Adelaide City are the most successful club in the competitions history, winning the competition a total of 18 times, including a run of five in a row from 1969 through to 1973. North Eastern MetroStars are the current champions, winning their seventh title in the 2025 final against Adelaide Croatia Raiders.