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Campus Update!

Classes Resume 10/20, College Night Tonight & Homecoming Week

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Campus Update! Featured Photo

Campus Update!

Classes Resume 10/20, College Night Tonight & Homecoming Week
campus closure alert 10/19

Campus Closure: 10/19

Mater Dei High School will be closed for instruction on Monday, October 19. There will be no in-person or online classes. Please click for more information.
my mater dei app

Introducing the My Mater Dei App

This student-created app makes it easier to navigate your Mater Dei day with a simplified view of the daily master calendar, personalized class schedules and Upper or Lower Lunch. Coming directly to student iPads and available now in the Apple App Store.
ask monty - chatbot

INTRODUCING: Ask Monty - Website Chatbot

Looking for when school starts? How about Semester Exams or Christmas Break? Or want to know who to contact to report an absence?  ASK Monty - our digital AI assistant right here on materdei.org.
2026 Spring Semester Honor Roll Featured Photo

2026 Spring Semester Honor Roll

Congratulations to all our Monarchs who made the 2026 Spring Semester Honor Roll. Your hard work and dedication have paid off, showcasing your commitment to academic excellence. Keep up the great work and continue to inspire others with your achievements!
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Upcoming Events

Choir Fall Concert

Time: 7 PM
Location: St Mark Presbyterian Church, Newport Beach
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We Are MD

Our Mission

Mater Dei is a co-educational Catholic college preparatory high school located in Santa Ana, CA. Rooted in our tradition of Honor, Glory, and Love, we serve a diverse student community committed to knowledge, faith, and service.
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Faith & Service Academics Athletics Campus Life The Arts

Mater Dei At A Glance

  • Uniquely Mater Dei
    • 216 Zip Codes
    • 124 Feeder Schools
    • 73% Catholic/ 27% Non Catholic
  • Faith & Service
    • 45K+ Hours Given Per Year
    • 600+ Organizations
    • 140 Average Hours Per Graduate
  • Comprehensive Academics
    • 59 Honors Courses
    • 21 AP Courses
    • 109+ Electives
  • Nationally Recognized Athletics
    • 28 Sports Teams
    • 71% Athletes on Honor Roll
    • 23 Gatorade Players of the Year
  • Unparalleled Arts
    • 82 Courses
    • 47% of student body
    • 70% of Artists on Honor Roll
  • Global Alumni Network
    • 30K+ Worldwide
    • Robust Alumni Business Network
    • 20% Faculty Staff are Alumni
Graduate in red cap and gown holds diploma, flanked by mascot characters.