The normal entrance age at Castleknock College Dublin is twelve to thirteen years. The Assessment Test in the year preceding entry enables the College to compile a pupil profile for each boy in terms of both potential and performance.
The Headmaster subsequently meets with the parents to appraise in conjunction with them, their choice of Castleknock College Dublin for their boy.
Subject to the College Admissions Policy being fulfilled, and a vacancy arising, students are accepted for the different years.
No boy is admitted unless a satisfactory character reference has been received from the Principal of his previous school. This is obtained directly by the College.
In the year before the boys entry into Castleknock College Dublin, his parents are invited to attend such events as Open Nights.