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
- Students
- Parents
- Faculty
- Alumni
- Grandparents
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
Behind every achievement, success, and championship, stand the alumni, parents, faculty, staff, and friends who fortify our future. We invite you to support MD in a variety of ways with a gift that is meaningful to you.

Events

Dec 3 Sat
- SAT Test
  7 AM – 2 PM (Various Classrooms)
  - Academics
Dec 5 Mon
- PLC Meeting
  2:25 PM (LCC)
  - Academics
Dec 6 Tue
- Diocesan President & Principal Christmas Luncheon
  10:30 AM (St. Catherines)
  - Diocesan Events
Dec 7 Wed
- Mock Trial Playoffs - Round 6
  5 PM – 7 PM (Santa Ana Courthouse)
  - Academics
Dec 8 Thu
- Academic Decathlon MDAD Speech & Interview Competition
  3 PM – 5:30 PM (MDHS 600-wing)
  - Academics
Dec 13 Tue
- Diocesan HS Learning Support Meeting
  9:30 AM – 10:30 AM (Zoom)
  - Diocesan Events
Dec 28 Wed
- Academic Decathlon Europe Trip
  (Vienna & Italy)
  - Academics
Dec 29 Thu
- Academic Decathlon Europe Trip
  (Vienna & Italy)
  - Academics
Dec 30 Fri
- Academic Decathlon Europe Trip
  (Vienna & Italy)
  - Academics
Dec 31 Sat
- Academic Decathlon Europe Trip
  (Vienna & Italy)
  - Academics

Su	Mo	Tu	We	Th	Fr	Sa
27	28	29	30••	1	2	3•
4	5•	6•	7•	8•	9	10
11	12	13•	14	15	16	17
18	19	20	21	22	23	24
25	26	27	28•	29•	30•	31•

Calendars

Diocesan Events
Counseling
Academics
Activities
Block Schedule
Athletics
Admissions
Alumni & Advancement
Visual Arts
The Arts
Campus Ministry
2022-2023 School Year

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