The Southern League Cup is a knock-out cup competition organised by the Southern Football League. The winning team are presented with the Southern League Challenge Trophy (trophy photograph). It was inaugurated in 1932 after receiving sanction from the Football Association, with the first competition taking place in the 1932–33 season.
Apart from two breaks, 1940–1945 owing to World War 2, and 2020–2021 owing to the COVID-19 pandemic, the tournament took place each year until 2022, after which it was discontinued.