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McGann-Mercy High School

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Founded in 1956 as Mercy High School, Bishop McGann-Mercy Diocesan High School (as it is now formally known) is a private, co-educational Roman Catholic school serving grades 7 through 12. Seventh and eighth grades were added to the high school in 1992, and in 2002 the former Mercy High partnered with the Diocese of Rockville Centre to become the school it is today. The school educates approximately 490 students annually, and is located on the corner of Ostrander Avenue and Middle Road.
1225 Ostrander Ave, Riverhead, NY 11901
(631) 727-5900
  • Fax: 631-369-7328
  • Accessibility Details: Multiple points of entry are handicapped accessible.
  • Accessible: yes
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