Loreto Abbey Dalkey was founded in 1843 as a boarding and day school. In 1982 the boarding school was closed. The day school today has a student population of approximately 620.
Loreto Abbey is a fee-paying Catholic Voluntary Secondary School for girls under the Trusteeship of the Loreto Education Trust. Thirty students come from Loreto National School Dalkey, their designated feeder school, every year, with the remainder joining from 25 additional primary schools.