Castilleja School

Castilleja School educates motivated young women to become confident thinkers and compassionate leaders with a sense of purpose to effect change in the world. Founded in 1907, Castilleja is the only non-sectarian, all-girls middle and high school in the San Francisco Bay Area.

Top Placements

Castilleja School places among the top 20% of private schools in California for:

School Overview

School Membership(s)School Assoc.National Association of Independent Schools (NAIS)
California Association of Independent Schools (CAIS)
Grades OfferedGrades 6-12
Year Founded1907

Student Body

Total Students430 students
Student Body TypeAll-girls
% Students of Color
State avg.: 45%
Students by Grade Castilleja School Student By Grade

Academics and Faculty

Total Classroom Teachers65 teachers
Student : Teacher Ratio7:1
National avg.: 13:1
% Faculty w/Advanced Degree
Average Class Size15 students
Number of AP Courses15 courses
List of Courses OfferedLink to List of Courses
Average SAT score1430
Average ACT score32
Matriculation DataMatric. DataLink to Matriculation Data

Finances and Admission

Admission DeadlineJan. 9
Yearly Tuition Cost$49,900
Tuition Notes$3.3 million in Tuition Assistance per year to 22% of student body.
% on Financial Aid
Admissions DirectorJill Lee
Endowment Size$55 million


Total Sports Offered11 sports
SportsBasketball, Cross Country, Golf, Lacrosse, Soccer, Softball, Swimming, Tennis, Track and Field, Volleyball, Water PoloBasketballCross Country,
Track and FieldVolleyball,
Water Polo

School Notes

  • Founded in 1907 by educator Mary Lockey, Castilleja is the only non-sectarian all-girls middle and high school in the San Francisco Bay Area. More than 100 years since its founding, Castilleja remains true to its mission to give each young woman an "educated heart." Castilleja also remains true to the 5 C's - conscience, courtesy, character, courage, and charity - which set the standard for a responsible and inclusive community.
  • Castilleja's pedagogical approach is shaped both by tradition and current research that affirm the significant personal and intellectual advantages of all-girls education. While emphasis is placed on academic development, Castilleja is just as committed to educating the whole person and to developing commpassionate and contributing global citizens.
  • The pursuit of our motto, "Women Learning, Women Leading," has led us to infuse our curriculum and progams with relevant, real-world experiences, which develop in each student the skills and self-confidence to reach her full potential. With the support of our extraordinary faculty and staff, we are dedicated to excellence in educating young women to lead in a changing world.
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  • School Location Miles Grades Students
  • Atherton
    Grades: 6-12 | 807 students
    2.4 miles
    50 Valparaiso Ave
    Atherton, CA 94027
    (650) 330-2000
    2.4 6-12
  • Los Angeles
    Grades: 6-12 | 430 students
    311.3 miles
    11725 W Sunset Blvd
    Los Angeles, CA 90049
    (310) 873-7020
    311.3 6-12
  • Los Angeles
    Grades: 7-12 | 533 students
    316.5 miles
    250 S Rossmore Ave
    Los Angeles, CA 90004
    (323) 935-1147
    316.5 7-12
  • Mountain View
    Girls' Middle School
    All-girls  | Alternative School
    Grades: 6-8 | 204 students
    3.9 miles
    3400 West Bayshore Road
    Mountain View, CA 94043
    (650) 968-8338
    3.9 6-8
  • Oakland
    Grades: K-12 | 877 students
    25.6 miles
    4315 Lincoln Ave
    Oakland, CA 94602
    (510) 531-1300
    25.6 K-12

School Reviews

Fun athletic energetic school with good teachers
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Did You Know?
The average private school tuition in Palo Alto, CA is $24,187 for elementary schools (read more about average private school tuition across the country).