Justin-Siena is a Catholic high school in the Lasallian tradition called to provide educational excellence in a loving, Christ-centered community that prepares students to serve and to lead in an ever-changing world.
Faculty and staff strive to serve a diverse ethnic and socio-economic cross-section of the surrounding communities.
We provide a superior academic experience. We prepare our students to be well-rounded and well prepared for college & life. At the heart of the rigorous, college preparatory academic experience at Justin-Siena is our commitment to fostering a personal, caring, and challenging atmosphere.
When a challenging curriculum is paired with enriching activities outside the classroom, students are able to further discover their talents within. These opportunities provide students with an environment geared toward testing their limits and discovering their potential.
As Lasallians we are called to provide a human and Christian education. We are proud to have served local and international students in our inclusive and faith based community for over 50 years.

Quick Stats (2022)

  • Top Ranked CA School
  • Grades: 9-12
  • Students: 620 students
  • Yearly Tuition: $22,150
  • Average class size: 24 students
  • Application Deadline: Dec. 16 / Jan. 27 / rolling
  • Source: Verified school update

Top Rankings

Justin-Siena High School ranks among the top 20% of private schools in California for:

Category
Attribute
Sports offered

School Overview

Religious Affiliation
Grades Offered
Grades 9-12
ADD/ADHD Support
Yes
Learning Difference Programs
Yes
Year Founded
1966
Summer School Offered
Yes

Student Body

Total Students
620 students
Student Body Type
Co-ed
% Students of Color
50%
State avg.: 48%
Students by Grade
Justin-Siena High School Student By Grade

Academics and Faculty

Total Classroom Teachers
58 teachers
Student : Teacher Ratio
11:1
National avg.: 13:1
% Faculty w/Advanced Degree
43%
Average Class Size
24 students
Number of AP Courses
40 courses
List of Courses Offered
Advanced Courses
Advanced Dance, Advanced Instrumental Music, Advanced Studio Art, Advanced Theatre, AP Art History, AP Biology, AP Calculus AB, AP Calculus BC, AP Chemistry, AP Computer Science, AP Economics, AP English Language Literature, AP Environmental Science, AP Government, AP Language, AP Micoeconomics, AP Physics, AP Spanish, AP Studio Art, AP United States History, AP World History, Honors Civil Engineering, Honors English 11, Honors English 12, Honors English 9, Honors Introduction to Engineering, Honors Physics, Honors Principles of Engineering, Honors Spanish II, Honors Spanish III, Honors Theatre, Honors US History, Pre AP English Language and Literature, Theatre in Production
Average SAT score
1170
Average ACT score
28
Matriculation DataMatric. Data
Classroom Dress Code
Formal
(Uniform polo shirt, uniform skirt and shorts, jeans, khaki colored pants)

Tuition and Acceptance Rate

Admission Deadline
Dec. 16 / Jan. 27 / rolling
Yearly Tuition Cost
Tuition Notes
The tuition packages is inclusive of most significant fees that Justin-Siena has typically charged families throughout the year. The following fees will no longer be assessed: student life, athletics, theatre, retreats, yearbook, or graduation.
% on Financial Aid
55%
Average Financial Aid Grant
$11,000
Admissions Director
Alicia Valdivia
Admissions Associate
Jeremy Tayson

Sports

Extracurriculars

Total ExtracurricularsTotal Extra-curric.
11 extracurriculars
ExtracurricularsExtra-curric.
Club or Organization:
Culinary Club, Friday Night Live, Leadership, Literary Magazine, Medical Futures, Mock Trial, Multicultural Club, Outdoor Club, Robotics Team, Student Ambassadors, Women's Empowerment

School Notes

  • Justin-Siena is a Catholic high school in the Lasallian tradition called to provide educational excellence in a loving, Christ-centered community that prepares students to serve and to lead in an ever-changing world.
  • Sample of notable school alumni/alumnae:
    • Josh Jackson - #4 NBA draft pick to Phoenix Suns
    • Brett Wallace - Professional MLB player
    • Olivia O'Brien - Singer, songwriter, Billboard Top 10
    • Mark Rappaport - Special make-up effects artist, CEO and owner of Creature Effects Inc, a company that provided special effects for many famous films, including Seabiscuit, The Revenant, Cowboys and Aliens, 300, and The Last Samurai. He received a prestigious technical ac
Source: Verified school update

School Reviews

5  
I am from Shanghai China. My husband and I are both baptised, we believe in God. We want to send our son Kevin to your school. Does Justin-Siena High School is a boarding school?
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Quick Stats (2022)

  • Top Ranked CA School
  • Grades: 9-12
  • Students: 620 students
  • Yearly Tuition: $22,150
  • Average class size: 24 students
  • Application Deadline: Dec. 16 / Jan. 27 / rolling
  • Source: Verified school update

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The average private school tuition in Napa County, CA is $10,263 for elementary schools (read more about average private school tuition across the country).

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