Damien Leo Leith (born 18 January 1976 in Dublin) is an Irish-Australian singer–songwriter. He was the winner of the Network Ten music contest Australian Idol 2006.

He was born in Ireland and now lives in Australia with his Australian wife, Eileen Stapleton, their two sons, Jarvis Dion (born 2005) and Jagger Ramone (born 30 May 2007) and daughter Kikki Bo (born 27 March 2011). Leith became an Australian citizen on 25 January 2007, taking the pledge from then Prime Minister of Australia, John Howard, in a nationally televised broadcast on Network Ten. Since winning Idol Leith has released seven albums, four of which peaked in the top two of the ARIA Charts, including two number ones. He has also released eight singles. He has been awarded seven platinum and one gold certification for albums and singles by ARIA, which equates to sales of just over half a million.