Building Foundations for a Lifetime

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.

SJ23’s teachers actively engage and inspire diverse learning styles so every student reaches his or her potential while at SJ23 and beyond. We are growing as saints together through service, excellence, discipleship, and community.

If you are wondering what it’s like to be a student here at SJ23, we welcome you to EXPLORE NOW through our 3D Virtual Tour.


St. John XXIII Catholic School received Exemplary Recognition

This school shaped who I am today. It helped shape my personal set of morals and values, which guide my decision making today, and encourage me to make a difference in the world.
-Ben Schueller (former student)


The Milwaukee Bucks and American Transmission Company (ATC) have teamed up to create more green spaces in Wisconsin for future generations to enjoy. Through the Trees for Threes platform, the ATC donates one tree to a Wisconsin school for every 3-pointer the Bucks hit at home. The Bucks scored a record 579 three-pointers last season, and we were one of 181 schools that received funding. Our new tree is now featured in the School Courtyard! We hope you enjoy it as it continues to grow!

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We have partnered with Wholesome Food Services and are pleased to be able to bring you a delicious variety of great lunch choices from local restaurants. It's quick, easy, and delicious! Download the 'WFS Ordering' App and register to create an account. You can set up a profile for each child. Get started today!

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Our philosophy is to provide positive, competitive athletic opportunities for each of our student athletes. Our objective is to teach every team member sports fundamentals, develop athletic skills and physical well-being, promote positive self-esteem, and encourage leadership teamwork, discipline, and moral courage. We believe and teach that hard work and perseverance is just as important as natural ability. Click below for registration and to view our calendar!

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