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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!
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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!
Kindergarten to the rescue! Our students helped their turkeys go undercover before Thanksgiving… and the disguises are absolutely priceless. ♥️
Our Middle School students wrapped up their Food Truck Frenzy elective today, and we are blown away by their creativity and hard work! Over the past few weeks, students designed their own food truck businesses from the ground up — creating a business plan, building a menu, setting prices, ...crafting a marketing strategy, and even 3D-printing their very own food truck models complete with serving windows!
Today was the big day: presentations AND taste-testing! Students proudly shared their concepts and brought in food samples inspired by their menus for classmates to enjoy. The room was full of teamwork, innovation, and some seriously delicious ideas.
Amazing job to all our young entrepreneurs!
Individual Ticket Prices go up SOON. To secure your seat for the lowest price...now is the time.
Enjoy:
*Live Casino-Style Games (Roulette, Craps & Blackjack with Classic Casino Entertainment) & Raffles
*DJ (Sound By Design MKE) & Dance Floor
*Fantastic Dining with... From Scratch Catering & Signature Cocktails
*Exciting Silent & Live Auctions
Whether you’re reserving your seat or going ALL IN as a sponsor, your support makes a lasting impact on our students and their future. Reserve your spot & explore sponsorships: https://keyevent2026.cbo.io/
Let’s go ALL IN—celebrating our mission, our students, and the future of SJ23!
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 🎨♥️