Jack Marsh (c. 1874 – 25 May 1916) was an Australian first-class cricketer of Australian Aboriginal descent who represented New South Wales in six matches from 1900–01 to 1902–03. A right-arm fast bowler of extreme pace, Marsh was blessed with high athletic qualities and was regarded as one of the outstanding talents of his era. His career was curtailed by continual controversy surrounding the legality of his bowling action; he was no-balled multiple times for throwing. As a result of the debate over the legitimacy of his action, Marsh never established himself at first-class level and was overlooked for national selection. In contemporary discourse, Marsh's lack of opportunities has often been attributed to racial discrimination.