Irish Film and Television Award for Best Actress in a Supporting Role – Film

For the first and second Irish Film and Television Awards ceremonies, supporting performances for film and television were combined into one category. Up until the 2018–2019 film season, awards were given for films released in Ireland the previous year.

Multiple wins
3 wins:
 * Saoirse Ronan

2 wins:
 * Fionnula Flanagan

Multiple nominations
4 nominations:
 * Saoirse Ronan
 * Ger Ryan

3 nominations:
 * Kerry Condon
 * Sinéad Cusack
 * Fionnula Flanagan

2 nominations:
 * Niamh Algar
 * Caitríona Balfe
 * Jessie Buckley
 * Elaine Cassidy
 * Anne-Marie Duff
 * Amy Huberman
 * Ruth Negga
 * Nora-Jane Noone
 * Deirdre O'Kane
 * Catherine Walker
 * Eileen Walsh