At a Glance


An independent school for girls in 6th-12th grades, Castilleja has been educating women leaders since 1907.


Our Students

Our student body reflects the cultural and economic diversity of our region—with some students who live in Palo Alto and surrounding communities and others who commute from San Francisco to the north, San Jose to the south, and various neighborhoods in the East Bay.

Inside and outside the classroom, learning and leading are intertwined at Castilleja. Our challenging academic program is enriched by our global curriculum, athletics, community engagement, visual and performing arts opportunities, Social and Emotional Learning (SEL) programming, and peer-to-peer mentorship across all grade levels.

Our Faculty

We are passionate about teaching young women to become intellectual partners through mentorship.

Castilleja faculty members are dedicated to educating young women for a lifetime of learning and leading and have been recognized by local, state, and national organizations for their contributions to student learning on our own campus and beyond.

Our Facilities

At Castilleja, learning is dynamic and exciting. Some lessons takes place in classrooms and science labs, while others happen in studios dedicated to art, music, drama, or video production. Additional campus features include:

Bourn Idea Lab

This state-of-the-art fabrication workshop features 3D printers, a laser cutter, traditional woodshop tools, robotics equipment, electronics components, microcontrollers, and so much more!

castilleja school bourn lab

Awareness, Compassion and Engagement Center (ACE)

Our campus resource for leadership, diversity, and global curriculum offers opportunities for internships and community engagement on local, national, and international levels.

Elizabeth Hughes Chapel Theater

The primary performance space on campus, our Chapel Theater features all-new sound and lighting systems with a dedicated control room where students practice production skills and techniques.

Margarita Espinosa Library

This communal open space for study and extended classroom work is supported by a variety of traditional and new media resources.

Joan Z. Lonergan Fitness and Athletics Center

Our multi-level facility encompasses two full gymnasiums, a cardio and weight-training room, a dance space, a yoga/spin studio, and an indoor climbing wall.

castilleja school athletic facility

Anita Seipp Gallery

This 1,000-square-foot art gallery features rotating exhibits by students and professional artists.

castilleja anita seipp gallery

416

students in grades 6–12

 

233

students in high school

183

students in middle school

69%

students of color

 

15

average class size

 

7:1

student to faculty ratio

 

58

full and part time faculty

 

79%

of faculty and staff have advanced degrees

 

75%

of students compete on at least one athletic team

 

21%

of students receive tuition assistance

 

$4

million in tuition assistance granted each year

$75

million endowment

 

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