Summer Camp Registration

Registration for Kellenberg Summer Camps is now open!

Registration and information can be found at

Information for Our Lady of Mercy Academy Students

Dear Our Lady of Mercy Students:

We are saddened to hear the news of the closing of Our Lady of Mercy Academy.  We realize that this is a very challenging time for you and want to assure you of our prayers and support.  We will assist you If you have an interest in attending Kellenberg Memorial High School in the Fall of 2024.  All of us want to work with you for a smooth completion of your Catholic High School education.

  1. Kellenberg Memorial High School will be represented at the High School Information Night at OLMA in February.  At that time we can answer your questions and you can find out more about our spiritual, academic, and activity/athletic programs.  In addition to being present at the HS Information Night, we have scheduled two dates to tour our school and speak with students and teachers:

    1. Thursday, February 29th from 5:00 PM – 7:00 PM
    2. Saturday, March 2nd from 12:30 PM – 2:30 PM

  2. We will have special Student Ambassador Tours / “Shadow Days” that run from 10:00 AM – 12:00 PM on 

    1. Tuesday, February 27, 2024 from 10:00 AM – 12:00 PM
    2. Monday, March 4, 2024 from 10:00 AM – 12:00 PM

These tours will allow prospective students (and their families) to tour Kellenberg during a school day.  Our Student Ambassadors will show you our Chapels, retreat house, courtyards, STEM labs, Cafeteria, Auditorium, Gymnasium, and many classrooms.
Prospective students listen in on classes, but do not actually sit in on a class.  

Please be assured of our prayers during this challenging time.  Please feel free to reach out to the Admissions Office at 516-292-0200 x208 or with any questions.

Official Letter from the Diocese of Rockville Centre Catholic High School Principals Found Here

Latest News

Students Rally at March for Life

Article by Phoenix writer Sophia Barnjak ’24: On January 18, a representative group of 32 Kellenberg juniors and seniors traveled on a 5 hour bus ride to Washington D.C. to participate in the March For Life. The students began their trip with a visit to the United States Holocaust Memorial Museum. Here, they had discussions…

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Deacon Harold Inspires Students with Wisdom on Relationship, Intimacy, and Holiness

Article by Phoenix writer Brooke Oldenborg ’26: Guest speaker Deacon Harold Burke-Sivers addressed the student body in two separate presentations on Thursday, February 15. Throughout the dual-assembly, Deacon Harold touched upon the topics of love, relationships, marriage, and family aiming to connect with the young crowd by making the discussion relatable and enjoyable. Grades 6-9…

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Seniors Participate in Annual Blood Drive

Article by Phoenix writer Bella O’Donnell ’24: On February 2, 2024, Kellenberg hosted the annual blood drive for our seniors. Over 100 students from the senior class donated a pint of blood. Several generous seniors even donated blood via the Alyx Machine or the Apheresis (platelet) donation. This machine separates platelets from the blood and…

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The Bro. Joseph C. Fox Latin School

at Kellenberg Memorial

A Qualitative Catholic Middle School Education With the Resources of a High School

Since 1988, the Brother Joseph C. Fox Latin School has been providing middle school students with a qualitative Catholic education in the Marianist Tradition. Students in the sixth, seventh, and eighth grades follow a challenging curriculum that stimulates their intellects and expands their understanding.

We are One Heart. One Mind. Firebirds. Kellenberg. Marianist. Catholic. Family. Kellenberg.


Kellenberg Memorial High School is accredited by the Board of Regents of the State of New York and the Middle States Association of Colleges and Schools.

About Kellenberg Memorial

Kellenberg Memorial High School is a private, independent Catholic school established in 1987. It is located near the middle of Nassau County, Long Island, on a campus of twenty-one acres. Kellenberg Memorial is owned and operated by the brothers and priests of the Marianist Community. The curriculum is exclusively college preparatory. Three academic programs prepare students for college studies. Financial constraints do not permit any special academic programs or modifications of the required curriculum. Admission is based on the Catholic High School Entrance Exam.

Learn More About Kellenberg Memorial Here

Faith is a primary aspect of the Kellenberg Memorial school community.

A Marianist Education

In addition to the academic and extracurricular programs at Kellenberg Memorial, students also share in a faith experience within the context of a Catholic school community. All activities, both inside and outside of the classroom, are carried out in the spirit of the Gospel of Jesus Christ. Through the spiritual dimension of their education students grow into mature, Christian men and women. Retreat Programs are held in Emmanuel Retreat House on campus and at Founder’s Hollow, a Marianist Retreat Facility in upstate New York.

Faith in Action

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