Mater Dei High School
Forward in Vision, Rooted in Tradition

About MD
Mater Dei is a distinguished destination of excellence in academics and technology, the arts, faith and service, campus life, and athletics. We are proud to be Orange County’s oldest and largest Catholic high school.
Admissions
Your journey to becoming a Monarch starts here! Tour campus, schedule a shadow day, begin your application, and more. We are excited for you to join the MD family!
Programs
Built on Catholic fellowship and intellectual rigor, our programs in academics, technology, athletics, faith and service, and the arts provide unlimited opportunities for student success. Comprehensive counseling and wellness resources educate and bolster families throughout the high school journey.
Faith in Action
Guided by the articulation of Catholic Social Teachings, Mater Dei prioritizes the faith development of our students with an emphasis on Christian service. We believe this allows our students to grow in their spiritual lives while living our gospel values through giving back to others and truly experiencing the face of God.
Campus Life
Through avenues of leadership, faith, shared interests, and extracurricular activities and events, students can make Mater Dei their own. Get involved today!
Community
Tradition never graduates. Alumni, lifetime parents, grandparents, and friends are a vital and vibrant aspect of our community. Once a Monarch, always a Monarch.
Giving

Class of 1971

Welcome Home Class of 1971

We are thrilled to share that planning is officially underway for the Class of 1971’s 55th Reunion!

While we’re still finalizing the details, we are looking ahead to October 2026 for this milestone celebration. Mark your calendars now, you won’t want to miss this unforgettable weekend of reconnecting, reminiscing, and celebrating 55 incredible years.

More details and registration information will be coming soon, so stay tuned!

In the meantime, please make sure your contact information is up to date so you don’t miss a thing. You can send updates to Danielle Hill ’01, Manager of Annual Fund & Alumni Relations at Mater Dei High School, at [email protected] or 714-668-1331.

We can’t wait to celebrate with you!