St. Boniface Diocesan High School is a private Catholic high school in Winnipeg, Manitoba, Canada. It was established in 1965 to provide Catholic high school education to English speaking students of the French Diocese of St. Boniface.
St. Boniface Diocesan High School now serves a broader community. It teaches students from the Archdiocese of Winnipeg, the Ukrainian Archeparchy of Winnipeg, and as well as non-Catholic students.