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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!
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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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An absolutely incredible morning celebrating our school community and Catholic School’s Walk! A huge thank you to Port Washington High School for welcoming us to their athletic field. It was the perfect way to showcase our community spirit, come together as a school family, and get everyone Read moreexcited for all the Homecoming festivities this afternoon! Thank you to our wonderful families for being part of such a special day. We are so grateful to be part of a community that shows up and celebrates together! Port Washington Football … Wishing you the best of luck in tonight’s matchup!
DAY 1 OF OUR 10TH ANNIVERSARY CELEBRATION: CATHOLIC SCHOOLS WALK!
We're kicking off our anniversary celebration by celebrating Catholic education and the students who make St. John XXIII so special! Our Catholic Schools Walk is a day of faith, fellowship, and fun as our school Read morecommunity comes together to support our mission and the opportunities we provide for our students.
This event is reserved for our school families, but our entire community can be part of the celebration! If you believe in our mission and would like to support Catholic education, consider making a pledge in support of our students. Every dollar raised goes directly back to SJ23 to help provide meaningful programs, resources, and opportunities. https://stjohn23rd.ccbchurch.com/goto/forms/415/responses/new
Thank you for helping our students thrive!
Happy Homecoming to the Port Pirates! Our students were over the moon to welcome them this morning and enjoyed reading stories together. Wishing them the best of luck tonight!
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! 💛⚾️💙