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Welcome to St. Mary’s!

Thank you for your interest in learning more about St. Mary’s, a premier, independent International Baccalaureate school in Orange County. As you look through our website, you will see that we are grounded in our mission: world-sized hearts and world-class minds. Every day our faculty and staff are collectively committed to delivering a balanced curriculum that challenges and engages all students.

St. Mary’s is truly a unique and special place. We have the privilege of educating over 700 students – from age 2 through Grade 8 – every school year. We pride ourselves on successfully delivering a blend of academic learning experiences that are rigorous, tied to the International Baccalaureate Programme and Design Thinking pedagogy. We believe this distinctive education model will help prepare our students to excel in a rapidly changing world.

Our mission at St. Mary’s is simple: “World-Sized Hearts and World-Class Minds.” We equally engage the hearts and the minds of our students. Our students become inquirers, seeking to understand the beautiful and diverse world around them. We encourage our students to ask “what” and “why,” and they begin to understand their role in the “how.” We inspire and empower our students to be change makers and lead lives that transcend the ordinary. 

This school year St. Mary’s celebrates its 30th anniversary. This is a major milestone in the life of a school. Rooted in Episcopal values, our faculty and staff carry our Founder Father Sillers’ vision forward every day. St. Mary’s education is values based with the goal that our students are good people prepared to make a positive difference in our world.

I am proud of the experience we give to every student. If you are here because you’re considering St. Mary’s for your student’s educational journey or if you’re already a member of our community, thank you for visiting and we hope to see you on campus soon.


Thank you!

Doug Patterson                                                                                                                                                                                                                                          Head of School