We are a Catholic School in the Marianist Tradition.

Our school lives out a Catholic Identity and encourages students to grow into a personal relationship with Jesus Christ. Kellenberg Memorial promotes a daily prayer life along with spiritual enhancements such as retreats, mission trips, and service opportunities that will enhance the faith life.

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. 

We are the School that Never Sleeps.

Kellenberg memorial sponsors over 80 co-curricular and extracurricular clubs and activities. 74% of the high school students participate in one or more of these clubs and activities. 92% of all high school students participate in at least one club or one sport. Participation in extracurricular clubs and activities is an essential part of the Kellenberg Memorial experience. Students have the opportunity to become involved in one or more of 80 different co-curricular or extracurricular activities.

Learn more about our activities here.

We believe in "an atmosphere that educates."

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 TACHS Exam.

We are inquisitive.

Science
Every high school student takes four-years of science. 100%
Math
Every high school student takes four-years of Math. 100%
English
Every high school student takes four-years of English. 100%
History
Every high school student takes four-years of History. 100%
Religion
Every high school student takes four-years of Religion. 100%

Honors Program

Students in the Honors Program take four years of the same World Language. World language options are Latin, French, and Spanish. The highest level course available in any subject is the honors level course.

Academic Program

Students in the Academic Program take three years of the same World Language. World language options are Latin, French, and Spanish. In their senior year, students take College Writing in lieu of a fourth year of a language.

Accelerated Course Offerings

Students advanced in Science may have the opportunity to participate in a seminar or study Advanced Biology, Environmental Science, or Health Science. Based on projected college course of study and historical academic performance, seniors may have the opportunity to study Introduction to Calculus, Statistics, Pre-Calculus, or Statistics & Trigonometry.

Students advanced in Math will study Introduction to Calculus during the senior year.

Students advanced in Science will study Environmental Studies, Health Science, Engineering, or Astronomy during the senior year.

Enrichment & Elective Course Offerings

Band, Chorus or Orchestra, Advanced Computer Applications, Digital Media, Computer Science, Art Portfolio Preparation, and Music Theory are offered as a 1/2 unit per year.

College Credit Offerings

College credit college credits are available for some Junior and Senior courses through the Farmingdale State College Program, St. Johnʼs University College Advantage Program, Hofstra University, and Molloy College Scholars Program. 

Courses include:

American History II, Intro to Calculus, Calculus 2, Art Portfolio Preparation, College Writing, English Literature, English Composition, Physics, Christian Existence, Latin, American Sign Language, Environmental Studies, French, Spanish, Astronomy, and Engineering.

Learn more about our Academic Curriculum

We are Firebirds.

Kellenberg Memorial sponsors 60 official interscholastic athletic teams. 62% of all High School students participate in at least one sport. Furthermore, a large number of students participate in intramural programs.

The Marianist philosophy as it pertains to Athletics is “educate the whole student – heart, mind, and the body.” Kellenberg athletic teams participate in arguably the most competitive athletic leagues in the country.

Kellenberg Memorial hosts recently renovated, state of the art athletic facilities for these teams as well.

Our Athletic program is designed to combine physical development, competition, and enjoyment as well as to promote integrity, fair play, and sportsmanship for those students who participate in it.

Learn more about our Athletics Program
Students who participate in at least one sport.
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Athletics Instagram

Follow @KellenbergAthletics on Instagram.

An opening night win for your varsity hockey team. With points from:

Points by:
Luca Coschignano- 2 goals, 3 assists Michael Parker- 2 goals, 3 assists
Jake Simeon- 1 goal
Robert Palma- 1 goal
Sean Roach-3 assists
Henry Soderlund- 1 assist

@kellenbergvarsityhockey

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Nov 25

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An opening night win for your varsity hockey team. With points from: Points by: Luca Coschignano- 2 goals, 3 assists Michael Parker- 2 goals, 3 assists Jake Simeon- 1 goal Robert Palma- 1 goal Sean Roach-3 assists Henry Soderlund- 1 assist @kellenbergvarsityhockey

An opening night win for your varsity hockey team. With points from:

Points by:
Luca Coschignano- 2 goals, 3 assists Michael Parker- 2 goals, 3 assists
Jake Simeon- 1 goal
Robert Palma- 1 goal
Sean Roach-3 assists
Henry Soderlund- 1 assist

@kellenbergvarsityhockey ...

Congratulations to swimmer Morgan Kelsch on finishing in 8th in NY State in the 100 Free!! 🐥🔥🏊‍♀️ @kmhsswimanddive

#Firebirds #Bleedblueandgold #rollbirds

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Nov 25

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Congratulations to swimmer Morgan Kelsch on finishing in 8th in NY State in the 100 Free!! 🐥🔥🏊‍♀️ @kmhsswimanddive #Firebirds #Bleedblueandgold #rollbirds

Congratulations to swimmer Morgan Kelsch on finishing in 8th in NY State in the 100 Free!! 🐥🔥🏊‍♀️ @kmhsswimanddive

#Firebirds #Bleedblueandgold #rollbirds ...

The accolades keep coming! Stella Becker of @kellenbergvolleyball was named AVCA honorable mention all American! 🔥🐥🏐

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Nov 21

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The accolades keep coming! Stella Becker of @kellenbergvolleyball was named AVCA honorable mention all American! 🔥🐥🏐

The accolades keep coming! Stella Becker of @kellenbergvolleyball was named AVCA honorable mention all American! 🔥🐥🏐 ...

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Athletics Headlines

We are One Heart and One Mind.

“All the believers were one in heart and mind.” – Acts 4:32

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, at Stella Maris Retreat House in Islip, New York and at Founderʼs Hollow, a Marianist Retreat Facility in upstate New York.

Leading Through Service

No service hours are required for students, yet 77% of students participate in a service activity, both at school and with outside organizations. Leadership is cultivated through service, and as students reach their Junior and Senior years, many opportunities arise to assume leadership roles within the school community. Peer leadership drives many activities and events. Members of the faculty guide and develop leadership skills that will last a lifetime.

Participate in service for the school and outside groups
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2030 Students

We are a family of over 13,000 alumni.

Annual Day of Giving Excites Kellenberg

March 25, 2025

Article by Phoenix writer Sophia Venturino ’26: Kellenberg hosted another successful Day of Giving for the 2024-2025 school year on Tuesday, March 18. This special celebration allows students and families to give back to their Kellenberg community and embrace the

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Alumni Spotlight: Jared Bonilla ’12

January 9, 2025

Jared Bonilla ’12 graduated from Molloy College in 2016 with a Bachelor of Science degree in psychology. After graduation, Jared transitioned into the professional world of artificial intelligence and data science, collaborating with some of the world’s leading private equity,

Read More »

We are creative.

Fine Arts are part of the Kellenberg Memorial academic curriculum.

All sixth-, eighth-, and twelfth-grade students take an Art class during the school day. Seniors are offered an optional full credit Art Portfolio Preparation course, to better train them and gain additional material for their college-entrance portfolio.

An Introduction to Music course is given to all students during their Junior Year. All seventh-grade students take Music 7, which presents the fundamentals of music theory in middle school.

High School students may choose to perform in Chorus, Band or Orchestra. All Latin School students perform in Band, Orchestra or Chorus. During the Senior year, students may elect to take an in-depth Music Theory class. In this class, students will explore the fundamentals of music composition, harmony, melody, rhythm, form, and structure.

Students are given the option of a Graphic Design course their senior year for those students who are interested in learning more about the Adobe Suite of professional digital media production software.

Our students also have the opportunity to participate in extra- and co-curricular activities including ETV, Social Media Club, The Phoenix (the school’s newspaper), Art Guild, Jazz Band, Firebird Swing, Chamber Ensemble, and a number of music ministry groups.

The Drama Club produces two shows per year; a fall musical and a spring play. Students perform in the cast, ensemble, pit-band, stage crew, and technical services in each production.

We are achievers.

Students who achieve an average of 85% (84.5%) or better on their grades for the First Trimester, Second Trimester, and the ending of the year have their names listed on the Kellenberg Memorial Honor Roll.

The Kellenberg Memorial chapter of the National Honor Society seeks to create an enthusiasm for scholarship, to stimulate leadership, and to encourage the development of good character. Juniors and seniors who achieve an average of 85% (84.5%) or better and participate in at least 2 activities or sports qualify to become a member of the National Honor Society.

Seniors admitted into the National Honor Society
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2030 Students

We are spreading our wings.

Check out the latest construction and renovation improvements to our campus. We’re investing in Firebirds for the years to come!

Follow us online to see more.

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