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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.
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“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
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?
Check us out on Facebook!
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
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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.
The things we make them do…🥰🤭
What would we do without Mr. Ryan & Mr. Jeff?!
Small Tabs. Big Impact.
A little tab can make a big difference! As part of our community outreach this year, Student Council is hosting a year-long pop tab collection benefiting Ronald McDonald House. Ronald McDonald House supports families when their children need medical care, helping Read moreremove barriers, strengthen families, and promote healing. No family should have to face a child’s medical crisis alone.
JOINING IN IS EASY! Save the little aluminum tabs from your cans and invite grandparents, friends, neighbors, and coworkers to save theirs, too. The tabs are recycled to raise funds that support Ronald McDonald House families. Bring your tabs to the collection container in the School Office anytime. Student Council will deliver everything we collect at the end of the school year! With months to collect and our whole community involved, just imagine how many tabs we can gather together! This simple act is a wonderful way to live out our school theme, “Go Make a Difference,” and serve others through love.
Thank you for pulling together to support families when they need it most!