| St. Louis High School, Rathmines Ardscoil San Lughaidh, | |
| Motto: | "Dieu Le Veult", "Ut Sint Unum" |
| Type: | Secondary School |
| Street: | Charleville Road, Rathmines |
| City: | Dublin |
| Country: | Ireland |
| Established: | 1913 |
| Coordinates: | 53.3214°N -6.2701°W |
| Students: | 700 |
| Principal: | Clíona McDonough |
| Staff: | 60 |
| Gender: | female |
| Lower Age: | 11 |
| Upper Age: | 19 |
St. Louis High School is an all-girls secondary school located in Rathmines, Dublin.
The school was founded in 1913 by the Sisters of St. Louis, a religious community of nuns which was founded in post-revolutionary France in 1842. 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.[1]
The school and others originally established by the Sisters of St. Louis are now under the trusteeship of The Le Cheile Schools Trust.[2] Le Chéile formally came into being on 1 September 2009 and offers a network of support for all St. Louis schools and staff.[3]
There are two school mottoes. The primary motto 'Dieu le Veult' which is old French for 'God Wills It' - the rallying cry of the Crusaders. The second motto is 'Ut sint unum' - for 'that they may be one'.[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.[5]