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 (drummer) (born 1946), drummer with the group Uriah Heep from 1970–1971 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