Flintridge Sacred Heart Academy is a private, all-girls Catholic high school in the Roman Catholic Archdiocese of Los Angeles run by the Dominican Sisters of Mission San Jose. It is located in La Cañada Flintridge, California, on a 41 acres (170,000 m2) campus near the San Gabriel Mountains. The school serves both as a day school and a boarding school, with 12% of the student population living on campus.