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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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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!
We want to take a moment to sincerely thank and recognize the incredible financial sponsors of our 2026 Key Event – Casino Royale. Your generosity and continued support mean so much to our school community. Because of you, this event is not only a success—but our school continues to grow, ...thrive, and provide amazing opportunities for our students.
👑 Royal Flush Sponsor
• TechNation / Cell Phone Repair | Proudly owned by the Sereno Family
🎲 High Roller Sponsor
• The Kitzinger Family
🍀 Lucky 7 Sponsors
• The Lackovic Family
• The Charlie & Julie Pfrang Family
♠️ Blackjack Sponsors
• Advanced Restoration | The Dimmer Family
• Ansay & Associates, LLC
• The Brewster Family
• Chimney Concepts
• Insight Investment Advisers
• The Joyce Family
• The Lippe Family
• RE/MAX United | The Didier Families
• Sharon-Cutwell
• St. John XXIII Catholic Parish
♥️ Ace of Hearts Sponsors
• Henkle Jr., Robert F.
• Knights of Columbus – Ozaukee Council 2035
• Port Washington State Bank
🎰Jackpot Sponsors
• BAIRD
• CG Schmidt, Inc.
• Eric von Schledorn Chevrolet Cadillac Inc.
• John & Kristen Cook Family
• Destination Kohler
• Jeff & Angel Schmit
• Port Washington–Saukville Rotary Club
🍎 Teacher Table Sponsors
• The Karasch Family
• Pear & Simple
We are truly grateful for each of you and the role you play in supporting our mission. Thank you for believing in our school and investing in our future!
As we monitor the upcoming “Extreme Cold Warning,” our primary focus remains the safety of our students. PLEASE NOTE: We will have a regular school day tomorrow, Thursday, January 22nd. However, school will be CLOSED this Friday, January 23rd. Plan to stay warm and look forward to kicking off ...Catholic Schools Week!
Kindergarten Classroom Creation prep is underway and we can’t wait for you to see the finished product!
Support our Kitchen & Hot Lunch Program by shopping Pampered Chef! There are tons of fun items to treat yourself plus a special Kitchen Wish List that helps directly support our school kitchen. Shop here: https://table.pamperedchef.com/party/2929061vgi
Hopping on the 2016 trend…
Here’s what we were up to back then! Do you recognize any of these faces? Share your favorite 2016 photos in the comments!
Don't forget to RSVP for our upcoming Father & Daughter Dance!
*INCOMING Pre-3 Students for the 26-27 School Year are welcome to attend. This is a great opportunity to meet school families! 💝