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

2026 Book Buy-Back

2026 Mater Dei High School

Book Buy-Back Policies

Book Return Dates:

Seniors: Tuesday, May 26 (8:00am to 3:00pm) - Wednesday, May 27 (8:00am to 3:00pm) - Location: Campus Store

All-School: June 1 (8:00am to 3:00pm) June 2 (8:00am to 3:00pm) - Location: Campus Store

Returns are Easy!

Bring all eligible books at one time to Book Buy-Back along with a printout of current class schedule (dates above).

Receive credit to use the next school year!

Seniors who have siblings at Mater Dei will have their credit issued to their siblings.

Seniors who do not have siblings who attend Mater Dei will have a refund check issued and mailed to their parent/guardian in July 2026.

Eligible Books - List will be posted in April 2026

Books must be the exact edition and ISBN as listed below AND course must be listed on students current 2025-2026 class schedule. Books in like new, excellent, or good condition will be accepted. Some writing and highlighting is acceptable. This excludes books with excessive damage.