Justin-Siena High School

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Definition of Terms 
2016 School Data
Justin-Siena High Boarding School Avg.
School Focus College Prep College Preparatory
Grades Offered 9-12 9-12
School Type Co-ed Co-ed
Religious Affiliation Catholic Non-denominational
Year Founded 1966 1910
Campus Size 40 acres 110 acres

Student Body

Enrollment 630 students 298 students
% Students of Color
% International Students
% Students Boarding
Average SAT Score 1669 * National Avg. »View
Average ACT score 24 *National Avg. » View
Offers Post-Grad Year No No

Academics and Faculty

Saturday Classes No No
Classroom Dress Code Formal
(Uniform polo shirt, uniform skirt and shorts, jeans, khaki colored pants)
Average Class Size 20 students 12
*National School Avg. » 20
Teacher : Student Ratio 1:12 1:7
# of AP / Advanced Courses Offered 39 16
ESL Courses Offered Yes Yes
Summer Program Offered Yes Yes


Yearly Tuition
(Boarding Students)
(7 day boarding)
Yearly Tuition
(Day Students)
$18,900 $28,500
Tuition international students $48,000 $47,000
Yearly Tuition
(5 Day Boarding)
$38,000 $38,000
% Students on Financial Aid
Avg. Financial Aid Grant $9,500 $21,582
Merit Scholarships Offered No No


Application Deadline Dec. 18 / Jan. 31 / rolling Jan. 15
SSAT Required Yes Yes
Director of AdmissionsAlicia Valdivia

Course Listings

List of Courses Offered Link to List of Courses

AP / Advanced Courses

# of AP / Advanced Courses Offered 39 16
CoursesAdvanced Choral, Advanced Dance, Advanced Studio Art, Advanced Theater, AP American Government, AP Art History, AP Biology, AP Calculus AB, AP Calculus BC, AP Computer Science, AP English Language, AP English Literature, AP Physics, AP United States History, AP World History, Honors Algebra II, Honors Chemistry, Honors English Language Literature, Honors Geometry, Honors Pre Calculus, Honors Spanish II, Honors Spanish III, Pre AP English Language and Literature


# Interscholastic Sports Offered 16 14
SportsBaseball, Basketball, Cheering, Cross Country, Dance, Football, Golf, Lacrosse, Soccer, Softball, Swimming, Tennis, Track and Field, Volleyball, Water Polo, Wrestling

School Notes

  • Justin-Siena is a Catholic, college preparatory high school in the Lasallian tradition which serves approximately 630 young men and women in grades 9 - 12. The School is located on forty acres in the City of Napa and in the Diocese of Santa Rosa. The school is accredited by the Western Association of Schools and Colleges (WASC) and the Western Catholic Education Association (WCEA). Justin-Siena serves a variety of students from Napa, Sonoma, and Solano Counties.
  • In 1966 two schools opened on adjacent campuses--Justin High School (for boys) sponsored by the De La Salle Christian Brothers and Siena High School (for girls) sponsored by the Dominican Sisters of San Rafael.  The schools merged in 1972 and were co-sponsored until the end of the 2005-06 school year when the Dominican Sisters transferred their sponsorship to the De La Salle Christian Brothers.  Justin-Siena High School continues today as part of a world-wide network of almost a thousand Lasallian schools found in 84 countries.The School is administered by a President and Principal and is staffed by a dedicated community of De La Salle Christian Brothers, Dominican Sisters of San Rafael, and lay men and women. Justin-Siena`s boarding program receives students 9th through 12th grade. The Boarding Program is located in a beautiful home on the north side of campus and is comprised of domestic and international students from around the globe. The house, which can house up to 28 students, has private rooms for each student. Students who reside in the Justin-Siena Boarding Program will experience:
  • A safe home with on-going adult supervision Home cooked dinners Weekend excursions with transportation English language support program Wireless internet access Academic support and resources On-site laundry facility Swimming pool
  • School accreditations: Western Association of Schools and Colleges (WASC), Western Catholic Education Association (WCEA), National Association of Independent Schools (NAIS)
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