Dafydd Ieuan (born 1 March 1969, Bangor, Gwynedd, Wales) is a Welsh musician, best known as the drummer with the band Super Furry Animals and The Peth.
Ieuan played with Gruff Rhys in their early band Ffa Coffi Pawb. He was also drummer for fellow Welsh group Catatonia in 1993-1996, before forming the Super Furry Animals.
Ieuan released an album with his project The Peth ("The Thing" in Welsh), which includes actor and friend of Super Furry Animals Rhys Ifans on vocals.
Ieuan lives in Cardiff with his wife Debbie and their two children Cai and Lleucu. He is musician Cian Ciaran's older brother.