Willie Clancy was an Irish uilleann piper. Clancy was born into a musical family at Islandbawn near Miltown Malbay, County Clare. His parents both sang and played concertina, and his father also played the flute.

Willie started playing the whistle at age 5, and later took up the flute. He first saw a set of pipes in 1936 when he saw Johnny Doran playing locally. He obtained his first set of pipes two years later. His influences included Leo Rowsome, Séamus Ennis, John Potts, and Andy Conroy. Clancy won the Oireachtas competition in 1947. Unable to earn a living from music he emigrated to London where he worked as a carpenter.