Mater Dei High School
Build The Future

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

Sep 4 Fri
- Fall Rally (MAC)
  Activities
- MD Spirit Dress
  Activities
Sep 8 Tue
- Club Rush during Both Lunches (Shamrock Plaza)
  Activities
Sep 9 Wed
- Club Rush during Both Lunches (Shamrock Plaza)
  Activities
Sep 10 Thu
- Special Dress: Red/White/Blue Dress with Spirit Bottoms
  Activities
Sep 15 Tue
- Senior Sunrise 5:30 AM – 8 AM (MD Parking Structure)
  Activities
Sep 18 Fri
- MD Spirit Dress
  Activities
- Special Comfy Dress
  Activities
- Current Freshman & New Student Tailgate 5:30 PM – 7 PM (SA Bowl)
  Activities
Sep 19 Sat
- Sailing @ 2026 PCISA Keelboat Qualifier (San Diego, CA)
  Activities
- Sailing @ PCISA SoCal #1 (Newport Beach, CA)
  Activities
Sep 20 Sun
- Sailing @ 2026 PCISA Keelboat Qualifier (San Diego, CA)
  Activities
Sep 24 Thu
- Special Performing Arts Dress: These Shining Lives
  Activities
Sep 25 Fri
- MD Spirit Dress
  Activities
Sep 26 Sat
- Sailing @ 2026 Singlehanded Pacific Coast Championship (Santa Barbara, CA)
  Activities
- MUN @ SOCOMUN 8 AM – 4 PM (Santa Margarita HS)
  Activities
Sep 27 Sun
- Sailing @ 2026 Singlehanded Pacific Coast Championship (Santa Barbara, CA)
  Activities
Sep 28 Mon
- MD Spirit Dress
  Activities
Sep 29 Tue
- Special Senior Dress: 2027 Senior T-Shirt with Spirit Bottoms
  Activities

Events in September 2026
Su	Mo	Tu	We	Th	Fr	Sa
					2 events ••
		One event •	One event •	One event •
		One event •			3 events •••	2 events ••
One event •				One event •	One event •	2 events ••
One event •	One event •	One event •			One event •	One event •

Calendars

Diocesan Events
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Activities
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Admissions
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