École secondaire Sophie-Barat is a Francophone public co-educational secondary school located in the Ahuntsic-Cartierville borough in Montreal, Quebec. Part of the Centre de services scolaire de Montréal (CSSDM), it was originally in the Catholic School board Commission des écoles catholiques de Montréal (CECM) before the 1998 reorganization of School boards from religious communities into linguistic communities in Quebec. In 2019, the school has 1,666 students and 115 teachers.