Justin-Siena High School

  • 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.

Top Placements

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

School Overview

School Membership(s)School Assoc.National Catholic Educational Association (NCEA)
Other religious school association(s)
National Association of Independent Schools (NAIS)
Western Association of Schools and Colleges (WASC)
National Association of College Admissions Counselors
Religious AffiliationRoman Catholic
Grades OfferedGrades 9-12
ADD/ADHD SupportYes
Learning Difference ProgramsYes
Year Founded1966
Summer School OfferedYes

Student Body

Total Studentsn/a
Student Body TypeCo-ed
% Students of Color
State avg.: 45%

Academics and Faculty

Total Classroom Teachers58 teachers
% Faculty w/Advanced Degree
Average Class Size24 students
Number of AP Courses40 courses
List of Courses OfferedLink to List of Courses
Advanced CoursesAdvanced 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 score1170
Average ACT score28
Matriculation DataMatric. DataLink to Matriculation Data
Classroom Dress CodeFormal
(Uniform polo shirt, uniform skirt and shorts, jeans, khaki colored pants)

Finances and Admission

Admission DeadlineDec. 15 / Jan. 24 / rolling
Yearly Tuition Cost$21,000
Tuition NotesThe 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
Average Financial Aid Grant$10,500
Admissions DirectorAlicia Valdivia
Admissions AssociateJeremy Tayson


Total Sports Offered16 sports
SportsBaseball, Basketball, Cheering, Cross Country, Dance, Football, Golf, Lacrosse, Soccer, Softball, Swimming, Tennis, Track and Field, Volleyball, Water Polo, WrestlingBaseballBasketball,
CheeringCross Country,
Track and FieldVolleyball,
Water PoloWrestling,


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.

Profile last updated:

Show me:
Show me:
  • School Location Miles Grades Students
  • Vacaville
    Grades: PK-12 | 702 students
    18.1 miles
    1117 Davis St
    Vacaville, CA 95687
    18.1 PK-12
  • San Francisco
    Grades: 9-12 | 1322 students
    38.2 miles
    1055 Ellis St
    San Francisco, CA 94109
    38.2 9-12
  • Vallejo
    Grades: 9-12 | 508 students
    18.3 miles
    1500 Benicia Road
    Vallejo, CA 94591
    18.3 9-12
  • Napa
    Grades: K-12 | 38 students
    0.5 miles
    3755 Linda Vista Ave
    Napa, CA 94558
    0.5 K-12
  • Napa
    Hopper Creek Montessori
    Montessori School
    Grades: PK-K | 36 students
    2.7 miles
    2141 2nd Street
    Napa, CA 94559
    2.7 PK-K

School Reviews

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?
- Posted by

Endorse Justin-Siena High School. Endorsements should be a few sentences in length. Please include any comments on:

  • Quality of academic programs, teachers, and facilities
  • Availability of music, art, sports and other extracurricular activities
  • Academic or athletic awards

I am a:

Name or Alias:

Your review:

Endorse this school:
Recent Articles
The Seattle area is home to many fine private schools as well as to major companies such as Microsoft, Boeing and Starbucks.
Religion is important to you. You want your children to be educated in a school where your religion matters.
The COVID-19 has turned our lives upside down. Sending your children back to school raises all sorts of concerns for their safety and education. We answer some of your questions here.
Request Information
I am a:      
Name of parent:
Student First name:
Student Middle name:
Student Last name:
Student date of birth:
Student is:
Currently in grade:
Seeking entry for grade:
Target start date:
Name of current school:
School type:
Applying for financial aid?:
Please briefly describe academic, athletic, and extracurricular interests of the student:

(enter "N/A" if not applicable)
Did You Know?
The average private school tuition in California is $11,437 for elementary schools and $19,936 for high schools (read more about average private school tuition across the country).
The average acceptance rate in California is 84% (read more about average acceptance rates across the country).