Castleknock (barony)

The barony of Castleknock (Irish: Caisleán Cnucha meaning "Cnucha's Castle") is a feudal title of nobility and one of the baronies of Ireland. Originally part of the Lordship of Meath, it was then constituted as part of the old county of Dublin. Today, it lies in the modern county of Fingal. The barony was created by Hugh de Lacy, Lord of Meath as his own feudal barony, held directly from himself in capite. His vassals were commonly called "De Lacy's Barons". The first vassal was Hugh Tyrrel. At the heart of the barony is the civil parish of the same name - Castleknock - which is one of eight civil parishes in the barony. In the townland of Castleknock itself is the location of the eponymous "Cnucha's Castle" - Castleknock Castle. The town with the biggest population in the barony is Blanchardstown.

It is one of seven and a half baronies that used to comprise the old county of Dublin. It stretches from Cabra to Blanchardstown (from east to west) and from Finglas to Chapelizod (from north to south). It is located between the baronies of Coolock to the east, Nethercross to the north and Dublin to the southwest. The River Liffey separates it from the remaining baronies. The whole of the barony is contained within the modern county of Fingal and it is subject to Fingal County Council.

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