Ian Clarke

Ian Clarke may refer to:


 * Ian Clarke (computer scientist) (born 1977), Irish computer programmer, the original designer and lead developer of Freenet
 * Ian Clarke (physician) (born 1952), Irish-born physician, missionary, philanthropist, businessman, resident of Uganda
 * Ian Clarke (flautist) (born 1964), British classical flute player and composer
 * Ian Clarke (gymnast) (born 1946), Australian Olympic gymnast
 * Ian Clarke (drummer) (born 1946), drummer with the group Uriah Heep from 1970 to 1971 and Cressida
 * Ian Clarke (rugby union) (1931–1997), New Zealand rugby player, farmer and rugby administrator
 * Ian Clarke (soccer) (born 1975), Canadian soccer player
 * I. F. Clarke (1918–2009), known as Ian, British bibliographer and literary scholar