Admission Inquiry 
Contact us 
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!
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!
How did early humans survive? Our 6th graders explored this question by creating prehistoric campsites that show how people met their basic needs for food, shelter, and safety. A creative, hands-on way to bring history to life!
10 DAYS. ONE INCREDIBLE COMMUNITY. St. John XXIII is celebrating 10 years of faith, fellowship, and community, and we want YOU to celebrate with us! From October 9–19, we're marking this special anniversary with 10 days of gratitude, joy, and unforgettable moments as we celebrate our Read moreincredible school and parish community. Whether it's gathering for BINGO, cheering on the Packers, coming together in prayer, or enjoying time with friends and family, there's something special happening for everyone!
Here's what's coming up:
October 9 – Catholic Schools Walk
October 10 – BINGO
October 11 – Green Bay Packer Tailgate
October 12 – CRE Gathering
October 13 – Evening Sporting Event
October 14 – St. John XXIII Holy Hour
October 15 – Rosary & Social
October 16 – Candlelight Eucharistic Procession
October 17 – Hospitality Mass
October 18 & 19 – LIFT: Good Pope John & Saints Who Inspire Us
We invite our school families, parishioners, alumni, and friends to join us as we celebrate all that God has done in our community over the past 10 years. Ten years of faith. Ten years of community. And so much more to celebrate! Keep an eye out for the daily posts on event details, and make plans to join us! We can't wait to celebrate with you!
Our classrooms were filled with blue & yellow today…
GO BREWERS! 💛⚾️💙
Our students had a special visit from the Port Washington Fire Department this week! They had the opportunity to learn important fire safety lessons, ask questions, and see some of the equipment our firefighters use to help keep our community safe. We are so grateful for the men and women who serveRead more our community! Their visit was a wonderful reminder of how important fire safety education is for our students—and for all of us! Be sure to check out their upcoming Open House! Families can meet our local firefighters, explore the station, learn more about fire safety, and enjoy a fun community event together. Thank you, Port Washington Fire Department, for all you do for our community—and for spending part of Fire Safety Week with us!
Middle school is a time to discover new interests, build friendships, and grow into the person you’re becoming. At St. John XXIII Catholic School, students have opportunities to do all of that in a community rooted in faith.
Our middle school students explore their interests through Read moreelectives such as gardening, sign language, art, music, and AI & creativity. They practice leadership through Student Council, put faith into action through service, and receive academic support that helps them build confidence and move forward. Along the way, they learn, laugh, and make memories together.
The best way to picture yourself here? Experience it! We invite prospective middle school students to schedule a shadow day. Spend a morning or afternoon in our classrooms, meet students and teachers, and get a feel for everyday life at our school. Whether you’re looking ahead to next school year or considering a change, we’d love to meet your family. Contact the school office to learn more and arrange your visit.
New opportunities. New friendships. Your next chapter starts now. Visit: stjohn23rd.school/contact
Let’s cheer on the BREWERS!
Students may wear a Milwaukee Brewers top with uniform bottoms tomorrow to show their support.
💛⚾️💙
Go Brewers!