Loyola Sacred Heart High School is a private, Roman Catholic high school in Missoula, Montana.

It is affiliated with St. Joseph Elementary School, and both institutions are supported by the Loyola Sacred Heart Foundation.

The Boys and Girls sports teams go by different names, being the Rams and the Breakers, respectively.

It originally existed as two separated schools: Loyola High School, a boys-only institution founded by the Jesuits; and Sacred Heart Academy for Girls, founded by the Sisters of Providence.

The first principal of the co-ed school was Orlando R. Barone of Philadelphia, Pennsylvania, who served for six years.