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 is 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.


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)


SJ23 was presented with a $225 check on behalf of the American Transmission Co. and Milwaukee Bucks for the purchase of trees. This partnership awards schools across ATC's service area with one tree for every three-point shot the Bucks made at home during the 2021-2022 regular season. The Bucks scored a record 579 three-pointers this season, and we are one of 181 schools that are receiving funding! Thank you to the Milwaukee Bucks for an amazing season!

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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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