Bishop Mcgann-mercy Diocesan High School (Closed 2015)

Home > New York > Suffolk County > Riverhead

Bishop Mcgann-mercy Diocesan High School (Closed 2015)

1225 Ostrander Ave
Riverhead, NY 11901

School Facts

Religious Affiliation

Catholic

Grades Offered

Grades 7-12

Students By Grade

View Data

Distribution of Students By Grade
Grade	Bishop Mcgann-mercy Diocesan High School
7	35
8	40
9	94
10	103
11	85
12	110

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Student Body

Total Students

467 students

Student Body Type

Co-ed

% Students of Color

16%

State avg.: 39%

Academic Profile

Total Classroom Teachers

46 teachers

Student-Teacher Ratio

10:1

National avg.:

Tuition & Financial Aid

Admission Deadline

None / Rolling

Admissions Director

Catherine Drew

School Notes

McGann ~ Mercy Diocesan High School is a community of approximately 380 students representing great geographic, economic, and religious diversity.
Students represent all levels of academic ability from average to honors.
At McGann-Mercy Diocesan High School, we require a commitment to excellence in any pathway that our students choose to pursue.
We pave the road they choose with ethics, curiosity, and moral character intertwined with spiritual commitment.
Our school encourages students, faculty and staff to work collaboratively to develop a learning community where innovative instruction, intellectual and imaginative activity, and coordinating community service challenge each person to attain his or her full potential.
McGann~Mercy's challenging academic program offers small classes and highly qualified teachers.
Students are afforded the personal attention needed to meet their individual needs and abilities.

McGann ~ Mercy Diocesan High School is a community of approximately 380 students representing great geographic, economic, and religious diversity.
Students represent all levels of academic ability from average to honors.
At McGann-Mercy Diocesan High School, we require a commitment to excellence in any pathway that our students choose to pursue.
We pave the road they choose with ethics, curiosity, and moral character intertwined with spiritual commitment.
Our school encourages students, faculty and staff to work collaboratively to develop a learning community where innovative instruction, intellectual and imaginative activity, and coordinating community service challenge each person to attain his or her full potential.
McGann~Mercy's challenging academic program offers small classes and highly qualified teachers.
Students are afforded the personal attention needed to meet their individual needs and abilities.

Source: National Center for Education Statistics (NCES)

Frequently Asked Questions

When is the application deadline for Bishop Mcgann-mercy Diocesan High School?

The application deadline for Bishop Mcgann-mercy Diocesan High School is rolling (applications are reviewed as they are received year-round).

Recent Articles

September 15, 2026

When Your Child Struggles in One 糖心原创 Subject

Learn what to do when your child struggles in one private school subject, including identifying causes, working with teachers, evaluating support, tutoring, progress, and next steps effectively.

September 15, 2026

Is Your Child Challenged or Just Given More Work?

Learn how to distinguish meaningful academic rigor from excessive workload by evaluating assignments, feedback, classroom expectations, assessments, and intellectual challenge when comparing private schools for your child.

September 15, 2026

糖心原创 Extra Help: Evaluating Teacher Access

Learn how to evaluate private school extra-help systems, including teacher availability, scheduling, advising, response times, and access, so your child can receive meaningful academic support when needed most.