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

Aug 2 Sat
- MD vs OCLA 12 PM – 1 PM (RSM Intermediate School)
- Los Al vs MD 4 PM – 5 PM (RSM Intermediate School Field 2)
Aug 4 Mon
- Summer Camp 10:30 AM – 2 PM (MDHS)
Aug 6 Wed
- Summer Camp 10:30 AM – 2 PM (MDHS)
Aug 7 Thu
- Summer Camp 10:30 AM – 2 PM (MDHS)
Aug 9 Sat
- Los Al vs MD 12 PM – 1 PM (RSM Intermediate School)
- Md vs Aliso Black 2 PM – 3 PM (RSM Intermediate School Field 1)
- Newport vs MD 4 PM – 5 PM (RSM Intermediate School field 2)
Aug 25 Mon
- Strength & Conditioning 2:45 PM – 3:45 PM
Aug 26 Tue
- Meeting Room 415 2:30 PM – 4 PM
Aug 27 Wed
- Soccer Field 2:45 PM – 3:45 PM
- Strength & Conditioning 4 PM – 5 PM
Aug 28 Thu
- Room 415 2:15 PM – 3:30 PM
Aug 29 Fri
- Soccer Field 2:45 PM – 4 PM
- Strength & Conditioning 4:30 PM – 5:30 PM