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

Homecoming Information

Mater Dei Homecoming 2026
Friday, October 23 vs. Orange Lutheran

MDHS Monarch Football Homecoming Game ~ Friday, October 23, 7 p.m. at the Santa Ana Bowl
Click here to get your tickets

Get out to the Santa Ana Bowl and watch your Monarchs take on the OLu Lancers.
Be sure to stop by and say hello to some fellow Monarchs and grab a treat at Alumni reception.
Look for the MDHS Tent near tunnels 1 & 2.

1950 Day ~ Annual Day of Giving
Join your fellow Monarchs as we come together for one day of giving to support the students of Mater Dei.

Upcoming Class Reunion Information
There are a lot of reunions coming up soon, be sure to check your class page for more information.

Contact Kathleen Kelly '94 with questions.
GO Monarchs!