McGann-Mercy Diocesan High School

1225 Ostrander Avenue, Riverhead, NY 11901

(631) 727-5900


Bishop McGann-Mercy High School, serves students in seventh through twelfth grades. Founded by the Sisters of Mercy sixty years ago, we excel in academics and lead our students to perform the works of mercy. Located in the Town of Riverhead, McGann-Mercy is the only Catholic High School on the East End of Long Island. At McGann-Mercy administrators, faculty and staff set high expectations for our students. Our small class sizes and our low student to teacher ratio enable our students to interact and connect with their teachers.

McGann-Mercy is big enough to offer a rigorous, diverse curriculum, a comprehensive athletic program and extensive extra-curriculars. Yet we are small enough to focus on the individual student and help our students reach their potential.

McGann-Mercy’s academic program is challenging, with AP and honors classes as well as curriculums in engineering and environmental sciences. Focusing on academic excellence, students are afforded the personal attention necessary to meet their individual needs and abilities. The 108 students in the Class of 2016 were rewarded for their efforts, earning over $15.7 million in college scholarships. That number represents their hard work in the classroom, on the playing field, in their respective clubs, and their commitment to service. Every student has the opportunity to stand out as a leader within the school community. It is because of our well-rounded philosophy of education that our students are routinely coveted by some of the best universities in the country.

In an environment that has been distinguished by the United States Department of Education as a National School of Excellence and The Commission on Secondary Schools of the Middle States Association, Bishop McGann-Mercy Diocesan High School is committed to preparing leaders for tomorrow.


  • Ms. Teri Barty, High School Admissions


  • Diocesan Priest and Sisters of Mercy


  • 525 Young Men and Women

2016-2017 TUITION:

  • Grades 7-8 $7,950
  • Grades 9-12 $9,950


  • $395 Registration Fee

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