Dominican College Sion Hill is one of the oldest girls' secondary schools in Ireland, founded in 1836 in Blackrock, County Dublin.

Its approach to education is based on the Dominican ideal of developing the whole person.

"Dominican College Sion Hill aims to help each student achieve their full potential academically, spiritually, emotionally and socially in a happy environment.

[3] It is a national school and has a catchment area of Blackrock-Monkstown-Dún Laoghaire-Dalkey[citation needed] Sion Hill was founded by the Dominican Sisters in 1836, in a suburban villa called Sion Hill because of rare shrubs brought by its owners from the Holy Land.

[4] There used to be two grass hockey pitches attached to the school but these were sold off in 1990 for residential development, built by 1992.