St Thomas, the Apostle parish is an ecclesiastical parish in the Blanchardstown deanery of the Roman Catholic Archdiocese of Dublin. It is served by the church of "St Thomas, the Apostle". The parish is centered on "Laurel Lodge" district and the townland of Carpenterstown in the civil parish of Castleknock, Fingal in Ireland. On 6 June 2018, the Archbishop of Dublin, Diarmuid Martin, concelebrated mass in the parish church on the occasion of the 25th anniversary of the laying of the building's foundation stone.