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WELCOME TO
OUR 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 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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2026-2027 EXTRACURRICULAR CLUBS
Clubs meet from 3:30-4:30 PM and are held in two sessions:
Dance Club
Piano Club
Coloring & Paint-By-Number
Magic School (AI & Creativity) Club
Construction (LEGO) Club
Early Childhood Building Club
Introduction to 3D Printing
Wild Card Club
Board Games
Sign Language
Sole Mates | Walking Club
Why St. John XXIII Catholic School?
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What a SPOOK-tacular night at SJ23! Thank you to everyone who joined us for Trunk or Treat last Friday! Even with the Brewers game on, we had an amazing turnout—and the kids had a blast! A special thank you to the Schueller, Ewig, and Silberman families for all their hard work in making this Read moreevent possible!
To all of our trunk decorators—you went above and beyond! Your creativity, treats, and enthusiasm made the evening extra special for our students and families. We’re grateful for this wonderful school community and everyone who helped bring the fun to life! Have fun photos from the evening? Share them in the comments—we’d love to see your favorite moments!
A VIP Thank You! We’re raising a glass to our Havana Nights VIP Tables! Thank you to the following businesses and individuals for supporting our 2027 Key Event. Your generosity helps make this celebration possible and supports the students at the heart of it all. A few VIP tables are still Read moreavailable! Gather your favorite people and reserve yours soon—we can’t wait to celebrate with you. Visit: keyevent2027.cbo.io
PHOENIX STRONG! Good luck to our 2026 Girls Division 1 Team at the Seton Tournament! Let’s fill the stands and cheer them on! We’re proud of your teamwork, determination, and hard work all season long.
📍 Milwaukee Sting Center
• Pool Play: Wednesday, October 28 | 5:30 PM
• Read more2nd Round: Friday, October 30 | 5:30 PM
• 3rd Round: Friday, October 30 | 7:30 PM
📍 Catholic Memorial High School
• Semi-Finals: Saturday, November 7 | 6:00 PM
• Finals — 1st & 3rd Place Matches: Sunday, November 8 | 6:00 PM
Games following pool play depend on team advancement.
Go Phoenix! We’re cheering you on!
A little Christmas Magic for the whole community! Join us at St. John XXIII Catholic School for Breakfast for Baby Jesus on Saturday, December 5! Bring your family and friends for a festive morning filled with:
🥞 All-You-Can-Eat Pancake Breakfast
☕ Hot Cocoa Bar
📚 Scholastic Read moreBook Fair
🎶 Christmas Music
🦌 Reindeer Food Station for Christmas Eve
✉️ Santa’s Mailbox—bring your Christmas wish list!
📸 Photos with Santa
Help us share the joy! Families visiting Santa are encouraged to bring a food pantry donation to help our neighbors this Christmas season. Everyone is welcome—you don’t need to be an SJ23 family to join the fun! Come make sweet memories and celebrate the season with us. RSVP: https://stjohn23rd.ccbchurch.com/goto/forms/428/responses/new
Who’s ready to win BIG while supporting St. John XXIII Catholic School? Our Main Raffle features THREE incredible prizes to help you plan your next adventure, enjoy a night around the fire, or cheer on the Milwaukee Brewers!
1 Ticket for $20 | 3 Tickets for $50 | 10 Tickets for $100
Read more
Grand Prize: Smoky Mountain Resort Getaway
Second Prize: Solo Stove Bonfire Bundle
Third Prize: Milwaukee Brewers Game
Every ticket purchased supports SJ23 and helps us continue providing amazing opportunities for our students! Interested in trying your luck? Tickets are available in the SJ23 School Office or from your favorite happy SJ23 student!
Thank you for supporting our school community.