Mater Dei High School

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
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.
- Students
- Parents
- Faculty

Aeries

Aeries is Mater Dei's Student Information System that allows parents and students to find up-to-date information about grades and attendance online.

Access for New Parents, Students and Transfer Students
Aeries log in information will be sent out via email to the primary email(s) provided during the registration process. Look for an email from [email protected] or [email protected] for password and login instructions. This is typically sent out in late July or early August for the new school year, or may be sent shortly after registration for mid-year transfer students.

Having trouble logging in?

Make sure you are using the correct portal website to login: Mater Dei Parent/Student Aeries Portal.
Check to ensure you are using the correct email and password combination. Click the "forgot password" option on the portal website to reset your password if needed.
If you are still having trouble and need additional assistance, please contact us at [email protected]. Be sure to include your name and your student's name (if you are a parent emailing for help).