Admission Inquiry 
Contact us 
WELCOME TO
St. John XXIII Catholic School
St. John XXIII Catholic School (SJ23) provides a foundation of Catholic values and academic excellence for its students in preschool through 8th grade. Our faculty and staff are dedicated to building a strong academic, social, emotional, and spiritual foundation for our students.
Learn more about our Catholic School Community
“I am beyond grateful for what St. John XXIII and the entire staff has done for my family. My kids would not be in the places they are if it weren’t for the dedication and love of the teachers and staff. THANK YOU ALL.”
– Current Parent
WE ARE EXCITED TO MEET YOUR FAMILY…
Choosing the right educational option for your child is one of the most important decisions you will make. It’s important that your child’s school is an educational partner with like-minded values and goals, dedicated to helping your child reach his or her social, emotional, intellectual, physical, and spiritual potential. If you are interested in becoming part of our school community, we welcome you to contact us today!
Quick links to help you
STAY CONNECTED
EXTRACURRICULAR CLUBS
Clubs meet from 3:30-4:30 PM and are held in two sessions:
3D Printing & Coding
Amazing Aspiring Artists
Bucket Drumming
Chess
Flag Football
LEGO Club
Sign Language
Soccer
Strategic Games
Volleyball
Watercolor Painting
Why St. John XXIII Catholic School?
Check us out on Facebook!
Our Student Council Root Beer Float Sale was a huge success! 🎉 We raised $300 to honor and thank our Port Washington Police Department. A big shoutout to our amazing families for supporting this meaningful cause!
We warmly invite you to support the Teacher & Staff Table at this year’s Annual Key Event. Our teachers and staff play an important role in shaping the lives of our students each day, and this is a meaningful way to honor their dedication, passion, and hard work.
By contributing, you... help us recognize their commitment and show your heartfelt appreciation. Your support ensures that these remarkable individuals are celebrated during an evening that highlights the strength and spirit of our school community.
Thank you to the Karasch Family for already making a contribution! Your kindness means so much to all of us! To join them and show your support, please visit: https://cbo.io/app/public/bidapp/keyevent2026/donate
*In the comment section, be sure to include it's intended for the Teacher & Staff Table!
Our halls are beautifully decorated! Thank you to Mrs. Gibson for showcasing our students creativity 🎨♥️
Great job, 5th Graders, on your Pizza Box Book Report Presentations! As part of a project-based learning activity, students transformed pizza boxes into creative book reports — identifying literary elements from their favorite fiction books and persuading their peers to give them a read. What a ...fun (and persuasive!) way to share the love of reading 📚♥️
A field trip for the memory books! 🎉
Huge thank you to the @mkeadmirals for hosting us today — and for bringing home a WIN! 🏒🔥 Our students had the best time cheering on the team, and the highlight of the day was meeting Ms. G’s brother, Andrew Gibson, after the game! He took time ...to say hi, snap photos, and sign autographs. What an unforgettable experience for our kids! 💙
See you tonight at Pear & Simple! ✨