John Cashman

• John Cashman (basketball), American basketball coach active in 1920s
• John Cashman (1890s hurler), Irish hurler for Blackrock and Cork
• John Cashman (hurler, born 1997), Irish hurler for Blackrock and Cork
• John Cashman (journalist), American war correspondent killed in a plane crash
• John Cashman (rower), American rower
• John E. Cashman, Boeing 777 chief test pilot
• John E. Cashman, Wisconsin politician