Séamus Ó Riain (2 April 1916 – 27 January 2007) was an Irish hurler, Gaelic footballer and Gaelic games administrator. He served as the 22nd president of the Gaelic Athletic Association from 1967 until 1970. Born in Moneygall on the Offaly-Tipperary border, Ó Riain was educated at Coláiste Éinde, Colaiste Caoimhin and De La Salle College Waterford where he trained as a national school teacher. He subsequently worked as a teacher in Cloughjordan, Newcastle West, Borrisokane and Dunkerrin. Ó Riain died on 27 January 2007.