|Motto||Women Learning - Women Leading|
|Founder||Mary Ishbel Lockey|
|Head||Nanci Z. Kauffman|
|Average class size||15|
|Student to teacher ratio||6:1|
|Campus size||6 acre|
|Athletics conference||CIF Central Coast Section|
(West Bay Athletic League)
Castilleja School is an independent school for girls in grades six through twelve, located in Palo Alto, in the U.S. state of California. Castilleja is the only non-sectarian all-girls middle and high school in the San Francisco Bay Area. The faculty consists of approximately 70 full-time and part-time women and men. Castilleja is a member of the California Association of Independent Schools and the National Coalition of Girls' Schools.
Castilleja was founded in 1907 by Mary Ishbel Lockey. Originally from Montana, Lockey graduated from Stanford University in 1902, where she majored in English. She was a charter member of Alpha Phi and was the first Stanford Alpha Phi elected to Phi Beta Kappa. She was encouraged by Stanford's first President, David Starr Jordan, to start a school that would offer girls a comprehensive, college preparatory education. In its early years, some boys were allowed to take classes at Castilleja. The school's core values, known as "the 5cs," include: conscience, courtesy, character, courage, and charity.
In 2007, Castilleja celebrated the 100th anniversary of its founding.
In 2016, Castilleja announced its intentions to build an underground parking garage and new buildings to increase enrollment to 540 students. Because of the scale of the proposed development in an R1 neighborhood, the project experienced considerable opposition among neighboring residents.
- Tori Anthony, pole vaulter
- Amy Chow, Olympic Gold medalist in gymnastics, Pediatrician
- Nancy Ditz, Olympic marathon runner
- Helen Katharine Forbes, 1908 graduate, muralist and painter
- Pansy Ho, Macau-born heiress and operator of casinos
- Josie Maran, actress and model
- Penny Pritzker, philanthropist; U.S. Secretary of Commerce
- Grace Slick, singer and songwriter
Castilleja is accredited by the Western Association of Schools and Colleges and is a member of the National Association of Independent Schools, the National Coalition of Girls' Schools, and the College Board. In late 2007, the Wall Street Journal identified Castilleja School as one of the world's top 50 schools for its success. In 2009, Castilleja was given the highest accreditation rating by the Western Association of Schools and Colleges. Castilleja was named one of the Bay Area's Best Private Schools by San Jose Magazine.
Castilleja was also recognized as the 5th best private high school in the United States by Niche.com in their 2015 rankings.
- Financing a Castilleja Education
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- Bay Area's Best Private Schools | San Jose Magazine
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- "2016 Best Private High Schools - Niche". K-12 School Rankings and Reviews at Niche.com. Retrieved 2016-03-14.
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