Iarla Ó Lionáird is an Irish singer from Cúil Aodha in County Cork, Ireland. He performs in the Irish sean-nós tradition, and his name also appears as Iarla Ó Lionaird or Iarla O'Lionaird.

He has released four albums through EMI/Real World Records. He is a member of The Gloaming and has also been part of Afro Celt Sound System.