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

Events

Mar 5 Tue
- Junior High Honor Choir Rehearsal 7 PM – 8:30 PM (Choir Room)
Mar 12 Tue
- Junior High Honor Choir Rehearsal 7 PM – 8:30 PM (Choir Room)
Mar 13 Wed
- Spring Concert - All Choirs 7:30 PM – 9:30 PM (Segerstrom Concert Hall)
Mar 14 Thu
- Select Choir Students - New Student Welcome Night #1 6:30 PM – 9 PM
Mar 19 Tue
- Coffeehouse Auditions - Songs WITHOUT Mr. Helwig 3 PM – 4:30 PM (Choir Room)
Mar 20 Wed
- Coffeehouse Auditions - Songs WITH Mr. Helwig 3 PM – 4:30 PM (Choir Room)