What's Possible?

Empowering Young Women Since 1907

Castilleja School educates motivated young women to become confident thinkers and compassionate leaders with a sense of purpose to effect change in the world.

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Discover Castilleja




Congratulations to the Class of 2023!




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Teaching & Learning Antiracism

Castilleja School must address racism and racialization with honesty, courage, and clarity of conviction, ensuring that Castilleja’s teaching and learning of antiracism engenders sustainable change and is not simply performative.



Intellectually engaging, collaborative and interdisciplinary, a Castilleja 6th through 12th grade education is carefully scaffolded to allow each student the opportunity to become her best and most authentic self.


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Castilleja's unique leadership development program is woven seamlessly throughout the daily lives of students in and out of the classroom.

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By engaging in a variety of hands-on making, tinkering, and engineering projects, students hone core competencies that empower them as innovators.

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    Castilleja admits students of any race, color, national and ethnic origin to all the rights, privileges, programs, and activities generally accorded or made available to students at the school. It does not discriminate on the basis of race, color, national and ethnic origin in administration of its educational policies, admissions policies, scholarship and loan programs, and athletic and other school-administered programs.