Coolmine is a primarily residential suburb of Dublin, Ireland, in the jurisdiction of Fingal. It is also a townland in the civil parish of Clonsilla.

Clonsilla or "Clonsillagh" 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. 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.