It is the mission of Holy Trinity High School to be a living witness to the Gospel of Jesus Christ as a community of faith, hope and love.
We seek to educate the whole person: mind, heart, soul and body, and to motivate all students in the pursuit of truth and academic excellence, preparing them for future educational opportunities and service to the Church and to the world.
Quick Facts (2025-26)
- Top Ranked NY School
- Grades: 9-12
- Enrollment: 677 students
- Yearly Tuition: $9,995
- Acceptance rate: 100%
- Average class size: 30 students
- Application Deadline: None / Rolling
- Source: Verified school update
Top Rankings
Holy Trinity Diocesan High School ranks among the top 20% of private schools in New York for:
Category
Attribute
Student Body
School Overview
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades 9-12
Year Founded
1966
Colors
White, Green
School Calendar
Last Day of School
Thu. Jun 25, 2026
Student Body
Total Students
677 students
Student Body Type
Co-ed
% Students of Color
49%
State avg.: 40%
Students by Grade
Academics and Faculty
Total Classroom Teachers
47 teachers
Student-Teacher Ratio
14:1
National avg.: 13:1
Average Class Size
30 students
Number of AP Courses
8 courses
Advanced Courses
AP BIOLOGYAP CALCULUS
AP CHEMISTRYAP ENGLISH
AP GOVERNMENTAP PHYSICS
AP SPANISHAP WORLD HISTORY
Classroom Dress Code
Formal
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Yearly Tuition Cost
Acceptance Rate
100%
National avg.: 81%
Admissions Director
fvega@holytrinityhs.org
Application URL
School Notes
- School Motto: We are THE LIGHT
- School Mascot: The Titan
Source: Verified school update
Frequently Asked Questions
How much does Holy Trinity Diocesan High School cost?
Holy Trinity Diocesan High School's tuition is approximately $9,995 for private students.
What schools are Holy Trinity Diocesan High School often compared to?
Holy Trinity Diocesan High School is often viewed alongside schools like Kellenberg Memorial High School by visitors of our site.
What is the acceptance rate of Holy Trinity Diocesan High School?
The acceptance rate of Holy Trinity Diocesan High School is 100%, which is higher than the national average of 74%.
What is Holy Trinity Diocesan High School's ranking?
Holy Trinity Diocesan High School ranks among the top 20% of private schools in New York for: Largest student body.
When is the application deadline for Holy Trinity Diocesan High School?
The application deadline for Holy Trinity Diocesan High School is rolling (applications are reviewed as they are received year-round).
Related Schools
Show me:
Popular comparisons: Holy Trinity Diocesan High School vs. Kellenberg Memorial High School
People that viewed Holy Trinity Diocesan High School also viewed these schools: Kellenberg Memorial High School, Long Island Lutheran Middle & High School, The Waldorf School Of Garden City, Saint Mary's High School, Manhasset and Grace Christian Academy.
The nearest high school to Holy Trinity Diocesan High School is Kellenberg Memorial High School (3.3 miles away)
The nearest elementary school and preschool is Long Island Catholic Elementary Schools - Department of Education (0.2 miles away)
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Show me:
School
Location
Miles
Quick Facts
1400 Glenn Curtiss Blvd
Uniondale, NY 11553
(516) 292-0200
Uniondale, NY 11553
(516) 292-0200
3.3 miles
Gr: 6-12 | 2,512 students Avg. class size: 20 students Tuition listed
131 Brookville Road
Glen Head, NY 11545
(516) 626-1736
Glen Head, NY 11545
(516) 626-1736
5 miles
Gr: 6-12 | 454 students Avg. class size: 16 students Sports: 15 | Extracurrculars: 32 Tuition listed
225 Cambridge Avenue
Garden City, NY 11530
(516) 742-3434
Garden City, NY 11530
(516) 742-3434
6.6 miles
Gr: NS-12 | 300 students Avg. class size: 18 students Sports: 11 | Extracurrculars: 13 Tuition listed
Saint Mary's High School, Manhasset
(Catholic)
51 Clapham Avenue
Manhasset, NY 11030
(516) 627-2711
Manhasset, NY 11030
(516) 627-2711
9.2 miles
Gr: 9-12 | 800 students Avg. class size: 15 students Sports: 15 | Extracurrculars: 22 Tuition & acceptance rate listed
36 Smith Street
Merrick, NY 11566
(516) 379-2223
Merrick, NY 11566
(516) 379-2223
5.7 miles
Gr: K-12 | 142 students Avg. class size: 13 students Sports: 6 | Extracurrculars: 12 Tuition & acceptance rate listed
School Reviews
5 7/24/2015
The sense of community and pride at this school is truly incredible. Once a Titan, Always a Titan. Class of 2012.
5 7/24/2015
I would certainly recommend Holy Trinity because it has great leadership, a very talented teaching staff that encourages their students and builds on their strengths. Father John is wonderful and caring. He even went to see the talented basketball team win the championship along with a very large group of students cheering on their fellow students. Big talent at this school!
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