Justin-Siena High School
Napa Valley's Premier Catholic High School - Faith, Knowledge, Service, Excellence
Justin-Siena High School is a premier Catholic college preparatory school located in the heart of Napa Valley wine country. Founded on the principles of faith, knowledge, and service, JSHS provides an exceptional education that combines academic excellence with character development, preparing students for success at top universities and beyond.
Our Mission
"Justin-Siena is a Catholic high school in the Lasallian tradition, whose mission is to educate and develop the whole person. Inspired by the core principles of Faith, Knowledge, and Service, we prepare students to become ethical leaders and responsible citizens who transform society.
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Key Info
Grades
Grades 9-12
Language Requirement
TOEFL 70+ or equivalent
Cost of Attendance
$25k - $50k
Accommodation
Homestay
Admission Information
Fall Admission
August Start
•Application Deadline: January
Main admission season with complete academic year experience, full course selection, and vibrant campus life. Highly recommended for new students.
Spring Admission
January Start
•Application Deadline: October
Limited mid-year admission available for exceptional candidates and transfer students.
Application Requirements
- Completed online application
- Official transcripts from previous schools
- English proficiency test (TOEFL 70+ or equivalent)
- Two letters of recommendation
- Personal essay and statement of purpose
- Student interview (virtual or in-person)
- Standardized test scores (optional)
- Catholic baptismal certificate (if applicable)
Why Study at Justin-Siena High School?
Lasallian Catholic Education Excellence
As a Lasallian Catholic school, Justin-Siena provides a values-based education that develops the whole person - mind, body, and spirit. Our unique educational philosophy emphasizes faith formation, academic excellence, and service to others. Students grow not just as scholars, but as ethical leaders committed to social justice and community service.
Napa Valley Wine Country Location
Located in the heart of world-renowned Napa Valley, students enjoy a safe, beautiful environment with access to unique educational opportunities. The region's thriving wine industry, agriculture, and hospitality sectors provide real-world learning experiences in business, science, and culinary arts. Just one hour from San Francisco and the Bay Area, students benefit from proximity to world-class universities and cultural attractions.
Outstanding College Preparation and Placement
Justin-Siena's rigorous college preparatory curriculum, combined with personalized college counseling, ensures exceptional university placement. With 100% university acceptance rate, extensive AP and honors courses, and strong relationships with top colleges, students are well-prepared for admission to prestigious institutions including Stanford, UC Berkeley, UCLA, and other leading universities.
Life at Justin-Siena High School
Study in Napa Valley, California - Wine Country Excellence
Justin-Siena High School is located in Napa, California, the heart of world-famous Napa Valley wine country. Students enjoy a beautiful, safe small-city environment with easy access to San Francisco (60 miles), wine country culture, and outdoor recreation.
Population of 80,000
Safe, charming city in world-renowned Napa Valley wine country with excellent quality of life
Easy access to multiple airports
Oakland International (OAK) 60 miles, San Francisco International (SFO) 65 miles, Sacramento International (SMF) 60 miles
Close to top-ranked universities
Including UC Berkeley (#15), Stanford (#3), UC Davis, and numerous Bay Area institutions
Campus Life at Justin-Siena
Experience our vibrant campus in beautiful Napa Valley
JSHS Campus
Beautiful campus in the heart of Napa Valley wine country
Justin-Siena High School Facts
Excellence in academics, faith, and service
Academic Excellence
Our comprehensive college preparatory curriculum combines rigorous academics with faith formation and character development, preparing students for success at top universities.
25+ AP and Honors Courses
100% University Acceptance Rate
98% Four-Year College Enrollment
Lasallian Catholic Education Philosophy
Small Class Sizes (Average 20 students)
1:14 Student-Faculty Ratio
Advanced STEM Programs
Comprehensive College Counseling
Dual Enrollment Opportunities
International Baccalaureate (IB) Preparation
Engineering and Computer Science Pathway
Business and Entrepreneurship Programs
Visual and Performing Arts Programs
World Language Programs (Spanish, French, Mandarin)
Faith Formation and Theology Courses
Service Learning Requirements