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 1 Tue
- MD @ Northwood High School 3:15 PM – 6 PM (Northwood High School)
Mar 10 Thu
- Girls Capo Relay Prelims (Select FS and Varsity Only) 3 PM – 5 PM (Capo Valley High School)
Mar 11 Fri
- Boys Capo Relay Prelims (Select FS and Varsity Only) 3 PM – 5 PM (Capo Valley High School)
Mar 12 Sat
- Capo Relay Finals (Select Boys & Girls FS an Varsity Only) 7 AM – 8 AM (Capo Valley High School)
Mar 15 Tue
- MD @ Irvine High School 3 PM – 6 PM (Woollett Aquatics Center)
Mar 18 Fri
- OC Frosh/Soph Invite Prelims (Select FS Boys & Girls Only) 3 PM – 6 PM (Brea Olinda High School)
Mar 19 Sat
- OC Frosh/Soph Invite Finals (Select FS Boys & Girls Only) 9 AM – 11:30 AM (Brea Olinda High School)
Mar 23 Wed
- MD @ Servite High School & Rosary Academy 3:15 PM – 6 PM (Servite High School)