Clonsilla (Irish: Cluain Saileach) or "Clonsillagh" [9 1] is a civil parish and a townland located in the south-western corner of the modern county of Fingal, Ireland. The civil parish is part of the ancient barony of Castleknock. It is centred on the suburban village of Clonsilla.[1] In geology, the parish rests on a substratum of limestone and comprises 2943 statute acres, the whole of which is arable land. It is roughly bounded to the north by the old "Navan Road" – the modern N3; to the east by the civil parish of Castleknock; to the south by the River Liffey; to the south-east by the civil parish of Leixlip, chiefly in County Kildare, and to the north-west by the civil parish of Dunboyne in County Meath.
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