Nioclás Tóibín (1928 – 1994) was a Sean-nós singer from the Déise tradition of County Waterford in Ireland. Nioclas was winner of Corn Chomhlucht an Oideachais consecutively from 1961 to 1963. The corn was the principal national singing prize in Ireland at the time.
Born in the Gaeltacht parish of An Rinn (Ring) in County Waterford. His father and mother, Séamas Tóibín and Maighréad Ní Sheanachain, were well known singers in the sean-nós style who had inherited the tradition from their own parents. Nioclás was known to sing songs such as 'Ar Éirinn Ní Neosfainn Cé Hí', 'Na Connerys' and 'Róisín Dubh'.