Trinity High School is a diocesan, Catholic, co-educational community, fostering mutual respect among students, faculty, staff and parents.
Its ministry is to teach the Gospel message, build fellowship and effect change through service to others.
Catholic values permeate the school's college preparatory curriculum for the maximum development of the whole person.
As a Catholic school and caring community, we are committed to the following objectives: to make students aware of peace and justice issues and provide them with motivation and empowerment to become involved; to offer a college-preparatory program that stimulates intellectual, creative, emotional and physical growth and develops critical thinking skills; to encourage in students a healthy respect for self, family, school and society while fostering caring relationships within the Trinity family; to maintain a strong campus ministry program which will infuse into all aspects of the school a sense of Catholic values and traditions, provide varied and age-appropriate religious worship experiences, all leading to an enhanced spiritual and moral development in students; and to provide an ordered and disciplined environment which facilitates the development of the whole person, while encouraging all individual gifts and talents.
Quick Stats (2025)
- Top Ranked NH School
- Grades: 9-12
- Enrollment: 331 students
- Average class size: 15 students
- Application Deadline: None / Rolling
- Source: Verified school update
Top Rankings
Trinity High School ranks among the top 20% of private schools in New Hampshire for:
Category
Attribute
Student Body
School Overview
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades 9-12
Year Founded
1970
Colors
White, Blue, Red
First Day of School
Tue. Aug 12, 2025
Last Day of School
Thu. May 28, 2026
Student Body
Total Students
331 students
Student Body Type
Co-ed
% Students of Color
14%
State avg.: 17%
Students by Grade
Academics and Faculty
Total Classroom Teachers
33 teachers
Student : Teacher Ratio
10:1
National avg.: 13:1
Average Class Size
15 students
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Application URL
Source: Verified school update
Frequently Asked Questions
What is Trinity High School's ranking?
Trinity High School ranks among the top 20% of private schools in New Hampshire for: Largest student body.
When is the application deadline for Trinity High School?
The application deadline for Trinity High School is rolling (applications are reviewed as they are received year-round).
In what neighborhood is Trinity High School located?
Trinity High School is located in the Hanover Hill neighborhood of Manchester, NH.
School Calendar
View the Trinity High School yearly calendar below.
Related Schools
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People that viewed Trinity High School also viewed these schools: Bishop Guertin High School, The Derryfield School, St. Thomas Aquinas High School, South Merrimack Christian Academy and Bradford Christian Academy.
The nearest high school to Trinity High School is Nfi - Midway Shelter (1.0 miles away)
The nearest elementary school and preschool is Cardinal Lacroix Academy (0.8 miles away)
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Show me:
School
Location
Miles
Grades
Students
Grades: 9-12 | 793 students 17.9 miles 194 Lund Road
Nashua, NH 03060
(603) 889-4107
Nashua, NH 03060
(603) 889-4107
17.9
9-12
793
Grades: 6-12 | 389 students 2.9 miles 2108 River Road
Manchester, NH 03104
(603) 669-4524
Manchester, NH 03104
(603) 669-4524
2.9
6-12
389
Grades: 9-12 | 414 students 32.1 miles 197 Dover Point Rd
Dover, NH 03820
(603) 742-3206
Dover, NH 03820
(603) 742-3206
32.1
9-12
414
South Merrimack Christian Academy
(Christian)
Grades: PK-12 | 273 students 14.4 miles 517 Boston Post Road
Merrimack, NH 03054
(603) 880-6832
Merrimack, NH 03054
(603) 880-6832
14.4
PK-12
273
Grades: K-12 | 211 students 24 miles 97 Oxford Ave. & 514 Main Street
Haverhill, MA 01835
(978) 373-7900
Haverhill, MA 01835
(978) 373-7900
24
K-12
211
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