Jack Clarke

• Jack Clarke (athlete), New Zealand marathon runner
• Jack Clarke (footballer, born 1931), Australian rules footballer and Essendon player
• Jack Clarke (footballer, born 1933), Australian rules footballer and East Fremantle player
• Jack Clarke (footballer, born 2000), English footballer
• Jack Clarke (racing driver), racing driver in the FIA Formula Two Championship
• Jack Clarke (rugby union), Irish rugby union player
• Jack Clarke (mountaineer), New Zealand mountaineer, first ascendant of Mounts Cook, Tasman and Aspiring