Tomás Mac Eoin (born 1937) is an Irish sean-nós singer, actor, songwriter and poet. Also known as Tomás McKeown, he is from An Bóthar Buí in An Cheathrú Rua, Conamara, Galway, Ireland. Known for his old-style or sean-nós singing, he was voted the best sean-nós singer in Ireland in 1967 at the Oireachtas competitions and won Corn Uí Riada. He appeared on The Waterboys's Fisherman's Blues album (1988). He was a regular singer on RTÉ Raidió na Gaeltachta and also performed on The Late Late Show several times. Some of his best known material include: