John Joseph William Cashman (21 April 1906 – 18 July 1982) was an Australian rules footballer who played for Fitzroy and Carlton in the Victorian Football League (VFL), West Perth in the West Australian Football League (WAFL) and Yarraville in the Victorian Football Association (VFA). Cashman was used during his career mostly as a ruckman and forward. He was recruited locally to Fitzroy and kicked 25 goals for them in 1929.