Cusack
- Adam de Feypo
- Alex Cusack
- Ann Cusack
- Aquitaine
- Ardee
- Balreagh
- Barony of Skryne
- Bibliothèque nationale de France
- Bordeaux
- Catherine Cusack
- Catherine Cusack (politician)
- Chancellor of the Exchequer of Ireland
- County Kilkenny
- County Louth
- County Meath
- Court of Common Pleas (Ireland)
- Cusack Patrick Roney
- Cusick
- Cussac, Haute-Vienne
- Cyril Cusack
- Dick Cusack
- Donal Óg Cusack
- Duchy of Aquitaine
- Dymphna Cusack
- Elizabeth Hickey
- England
- Fore (County Meath barony)
- France
- Franciscan
- Geoffrey (given name)
- Great Seal of Ireland
- Hugh de Lacy, Lord of Meath
- Inner Temple
- Ireland
- Joan Cusack
- John Cusack (disambiguation)
- John de Lacy, 2nd Earl of Lincoln
- John of England
- Joyce Cusack
- Killeen Castle, Dunsany
- Knight-service
- Knocktopher
- L.A. Law
- Llanthony Priory
- Llanthony Secunda
- Lord
- Lord Chancellor of Ireland
- Maddy Cusack
- Maggie Cusack
- Magna Carta
- Mary Frances Cusack
- Master of the Rolls in Ireland
- Michael Cusack (Gaelic Athletic Association)
- Mullingar
- Neil Cusack
- Niamh Cusack
- Norman invasion of Ireland
- Normans
- Pádraig Cusack
- Ralph Cusack
- Robert Cusack
- Sean Cusack
- Sean Cusack (rugby league)
- Sinéad Cusack
- Sir Ralph Vincent Cusack
- Sorcha Cusack
- The Song of Dermot and the Earl
- Thomas Cusack (Irish judge)
- Thomas Cusack (politician)
- Thomas Cusack-Smith
- Walter de Cusack
- Walter de Lacy (died 1085)
- Willa Cather