The school crest symbolises loyalty to the French crown.

An edited collection entitled We were happy there: Hundred Years of St Louis High School Rathmines by Ita Daly describes the experiences of being a pupil at the school.

[2] Le Chéile formally came into being on 1 September 2009 and offers a network of support for all St. Louis schools and staff.

The primary motto 'Dieu le Veult' which is old French for 'God Wills It' - the rallying cry of the Crusaders.

[4] In 2018, the school was ranked fourth in Ireland in terms of the number of students who progressed to third level and by the types of institutions to which the students progressed.