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

Dec 1 Tue
- Christmas Spirit Week
  Activities
- OC Academic Decathlon Round 1 3:30 PM – 5 PM (Classroom 606 (Virtual))
  Activities
Dec 2 Wed
- Christmas Spirit Week
  Activities
Dec 3 Thu
- Christmas Spirit Week
  Activities
- OC Academic Decathlon Round 1 3:30 PM – 5 PM (Classroom 606 (Virtual))
  Activities
Dec 4 Fri
- Christmas Spirit Week
  Activities
- MD Spirit Dress
  Activities
- St. Nicholas Day
  Activities
Dec 5 Sat
- V Surf @ Wilson 6:30 AM (Bolsa Tower 22)
  Activities
Dec 7 Mon
- Academic Decathlon Speech & Interview Competition 3 PM – 5:30 PM (600 Wing Classrooms)
  Activities
Dec 11 Fri
- MD Spirit Dress
  Activities
Dec 12 Sat
- Sailing @ 2026 ISSA Hogan Keelboat Invitational Regatta (St. Petersburg, FL)
  Activities
- Academic Decathlon Super Quiz & Awards 2 PM – 4 PM (LeVecke)
  Activities
Dec 13 Sun
- Sailing @ 2026 ISSA Hogan Keelboat Invitational Regatta (St. Petersburg, FL)
  Activities
- Sailing @ PCISA SoCal #3 (San Diego, CA)
  Activities
Dec 18 Fri
- MD Spirit Dress
  Activities

Calendars

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