St. Joseph High School is a Catholic learning community of students, parents and educators that delivers the highest quality college preparatory programs and inspires a strong family spirit of shared Christian values in students who seek to develop their faith, their intellect, and their ability to make a positive mark on the world in which they live.

The mission of St. Joseph High School, a Catholic, college preparatory school in the Archdiocese of Los Angeles, is the formation of the person To Image Christ in Mind, Heart, Body, and Soul within the context of the Christian family community. Upon graduation students will possess the foundation to build a personal relationship with God, achieve in post-secondary education, and thrive in a fast-paced, innovative world to build the Kingdom of God in the Church, the community, and the world.