Sibéal Ní Chasaide (; born 1998), known mononymously as Sibéal, is an Irish singer from the Ráth Chairn Gaeltacht, County Meath, specializing in the centuries-old melismatic Irish singing style of sean-nós. She is best known for her collaboration with Patrick Cassidy singing his arrangement of Patrick Pearse's "Mise Éire" at the official government commemorations of the 1916 Rising.