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

Apr 8 Fri
- Thespian State Festival (Upland High School)
  Performing Arts
- Synthesis Movement Arts Concert 7 PM (Barclay Theater)
  Performing Arts
Apr 9 Sat
- Thespian State Festival (Upland High School)
  Performing Arts
- Synthesis Movement Arts Concert 7 PM (Barclay Theater)
  Performing Arts
Apr 10 Sun
- Thespian State Festival (Upland High School)
  Performing Arts
Apr 13 Wed
- Performing Arts Showcase 10:15 AM (MAC)
  Performing Arts
Apr 25 Mon
- Student Publications Banquet 6 PM (LeVecke)
  Performing Arts
Apr 28 Thu
- Senior Musical: High School Musical 8 PM (Grotto)
  Performing Arts
Apr 29 Fri
- Senior Musical: High School Musical 8 PM (Grotto)
  Performing Arts
Apr 30 Sat
- Senior Musical: High School Musical 8 PM (Grotto)
  Performing Arts

Calendars

Select all