St. John the Baptist Diocesan High School

St. John the Baptist Diocesan High School We are a diocesan college preparatory school located in West Islip, New York, educating grades 9th - 12th. The community spirit at St. Faculty members at St.
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Our teachers, coming from varied backgrounds and experiences, are committed to imparting specialized academic knowledge to their students. John’s allows teachers to know their students as individuals both inside and outside of the classroom. Our student to teacher ratio is approximately 16:1. In this setting, students learn in an atmosphere of close and caring academic instruction and leadership.

John’s are required to possess a Master’s Degree, have New York State Teacher Certification, and continue on in the educational journey by participating in post-Master’s work, doctoral studies, conferences and workshops. Teachers and administrators at St. John’s recognize the impact they have on the young people they meet and work with each day. The work of service and justice is not just for Campus Ministry but for all who are part of this community. More than educators of the minds, teachers at St. John’s also nourish the soul. They work to be present to students before and after school, by moderating clubs and coaching and participating in various retreat and social experiences. Our faculty also serve as a witness to what it is to live a good, Christian life by who they are and what they do inside and outside of the classroom. Faculty members include Sisters of St. Francis, Sisters of St. Dominic and lay women and men. Every teacher who works at St. John’s knows the important dual role they play – to not only encourage thought but to empower students to act for the good of others and the world in which they live!

Calling the Class of 2010! Your classmates have planned a special reunion to reconnect, catch up, and celebrate 16 years...
08/20/2026

Calling the Class of 2010! Your classmates have planned a special reunion to reconnect, catch up, and celebrate 16 years since graduation!🎓

📅 Saturday, September 12, 2026
⏰ 4:30 – 7:30 PM
📍 Lily’s Babylon
🎟️ Tickets: $90

We hope to see the Class of 2010 come together for a great evening of memories and celebration! Get your tickets today: sjbclassof2010reunion.rsvpify.com🐾

08/20/2026

From their experiences at SJB to meaningful careers in New York City, Gabriel Campos ’16, NYC Green Infrastructure with the NYC Department of Environmental Protection, and Megan Moelledorf ’16, a NYCDOE Special Education Teacher, continue to carry the lessons they learned at St. John’s with them. Whether protecting New York City’s natural environment or creating inclusive opportunities for students through special education and dance, both credit SJB’s teachers, programs, and diverse experiences with helping shape who they are today. Their stories are a wonderful reminder that the experiences and connections made at SJB can inspire passions that last well beyond graduation! 🌳💃📚 🐾

Join us for Open House on Saturday, October 24th from 10 AM–1 PM! Discover all that SJB has to offer through academics, ...
08/19/2026

Join us for Open House on Saturday, October 24th from 10 AM–1 PM! Discover all that SJB has to offer through academics, athletics, performing arts, service, faith, and our welcoming Cougar community. Rise to the Challenge and discover how you can become a Cougar. Registration is required, visit stjohnthebaptistdhs.net/open-house-registration or scan the QR code to register today! 🐾❤️

08/19/2026

At SJB, the Genesis Research Program challenges students to think beyond simply finding answers and instead embrace the entire research process. Faculty advisor Daniel Maher shares how students identify meaningful questions, analyze data, uncover gaps, and use their findings to inspire new areas of exploration. One student took her research on lower extremity injuries in female athletes a step further by examining athletic cleat design and developing a prototype aimed at reducing injuries. Through Genesis, our students are learning that great research doesn’t just answer questions, it creates new ones! 🔍✨💡👟

08/19/2026

Mr. Albrecht is back with another Rise & Shine as we get ready to welcome our Cougars back for an exciting 2026–2027 school year! With freshman families arriving next week, orientation right around the corner, and plenty of summer improvements happening throughout our building, there is so much to look forward to. This year is especially meaningful as we celebrate 60 years of excellence at St. John the Baptist. Enjoy the final days of summer, Cougars, and we’ll see you real soon! 🎉❤️

08/18/2026

Mr. Christopher Gironda, Social Studies Teacher and advisor to the Business Bloomberg Club, shares how SJB students gain real-world experience in financial literacy, investing, budgeting, and entrepreneurship. With the Bloomberg program coming in-house, students will have even more opportunities to develop valuable business skills and learn from industry professionals. Get involved early, get involved often, and make the most of every opportunity at SJB!💼📈💙

Join us on Monday, September 28 at Stonebridge Country Club as we honor our 2009, 2013, 2015 & 2016 SJB Boys Lacrosse Ch...
08/17/2026

Join us on Monday, September 28 at Stonebridge Country Club as we honor our 2009, 2013, 2015 & 2016 SJB Boys Lacrosse Championship Teams! We look forward to bringing our Cougar community together to celebrate these outstanding teams and their lasting legacy at St. John the Baptist. Purchase your tickets today: www.stjohnthebaptistdhs.net/golf-outing 🎟️🏆🥍⛳

We are proud to recognize Aidan Butler ’26 and Alexander Jakubiuk ’26 for being honored at the 2026 High School Senior S...
08/14/2026

We are proud to recognize Aidan Butler ’26 and Alexander Jakubiuk ’26 for being honored at the 2026 High School Senior Scholarship Celebration Event, hosted by Stony Brook Southampton Hospital and the Southampton Hospital Association. Congratulations, Aidan and Alexander, on this wonderful achievement and for representing SJB! 🎉🎓🏆👏

08/14/2026

Step into the courtroom with SJB's Mock Trial Club! Led by English teacher and moderator Regina Hall, students develop critical thinking, public speaking, and teamwork skills as they prepare legal cases and compete at a high level. Along the way, they gain confidence, learn to think like attorneys, and build friendships that make the experience truly rewarding. From the courtroom to Harvard Law and beyond, the Mock Trial Club continues to inspire future leaders and showcase the incredible opportunities available at St. John the Baptist. 🗃️⚖️🐾

Round 2! The SJB Cheerleading Program is back for another Car Wash Fundraiser this Saturday, August 15 from 9 AM–1 PM! S...
08/13/2026

Round 2! The SJB Cheerleading Program is back for another Car Wash Fundraiser this Saturday, August 15 from 9 AM–1 PM! Stop by SJB, get your car sparkling clean, and help support our amazing cheerleaders! We hope to see our Cougar community there for another great day! 📣🚗🫧 🐾✨

Address

1170 Montauk Highway
West Islip, NY
11795

Opening Hours

Monday 7am - 4pm
Tuesday 7am - 4pm
Wednesday 7am - 4pm
Thursday 7am - 4pm
Friday 7am - 4pm

Telephone

+16315878000

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