Mater Dei High School
Forward in Vision, Rooted in Tradition

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

Alumni Events and Meet Ups

We hope to see you at our upcoming events...

Mater Dei Business Professionals Mixer
Join us as we connect top-tier professionals from the Mater Dei network - Alumni, Current & Lifetime Parents, Grandparents and Friends of Mater Dei. All are welcome to join the fun. Look for our 2026 dates coming soon with events taking place in September, December and March

Summer Alumni Mixer - June 25, 2026
Green Cheek Beer Company - 5:30 p.m.
$10 per person - includes snacks and 1 drink
Tell a friend!
Register Now!

Thank you to all who joined us in the Monarch Baseball Night at the Ballpark

Enjoy the photos here. If you have additional photos you'd like to share, please send them to [email protected]

Contact Kathleen Kelly '94 if you have any questions - [email protected]

If you have a location suggestion, or would like to host a meeting at your office or restaurant, or you are interested in spearheading an MD event outside of Orange County, please contact Kathleen Kelly '94.

Upcoming Events:

Mater Dei Class Reunions

MDHS 75 Anniversary Celebration!