Duncan Smith

Duncan Smith may refer to:


 * Duncan Smith (Australian politician) (1890–1973), Australian politician
 * Duncan Smith (Irish politician) (born 1983), Irish Labour politician
 * Duncan Smith (footballer) (born 1929), Scottish footballer
 * Duncan J. D. Smith (born 1960), British travel writer, photographer, historian, and explorer
 * Duncan Smith (cricketer), British cricket player