Discover the Difference of Catholic Education


St. John XXIII Catholic 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


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 explore now through our 3D Virtual Tour, or contact us to schedule an in-person tour or shadow day.



Clubs evolve and change based on student interests and parent enthusiasm. For this school year, Clubs meet from 3:30-4:30 PM and will be held in two sessions.

2023-2024 Clubs Include:
Watercolor Painting
Construction Club
Sign Language
Outdoor Neighborhood Games
Coding Club


Why St. John XXIII Catholic School?

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Join Our Team! 🍎 Are you passionate about education and looking to make a difference in the lives of students? St. John XXIII Catholic School is hiring dedicated professionals to join our vibrant community!

Spanish Teacher:

7th & 8th ELA Teacher: ...

Math & Reading Interventionist K5-8th Grade:

Learn More & Apply Now!

We are thrilled to announce a wonderful addition to our school community: Gracie, an English Cream Retriever! She's a certified therapy dog through Pets Helping People. She's been a beacon of comfort and joy at various events, including Comfort Days at UWM and Concordia University, where ...she engages with students. Gracie also spends Tuesdays at Lincoln Elementary School, helping students work on their reading skills, and on Fridays, she brightens the day for students at Port Washington High School during lunch and exam times. Soon, Gracie will also be extending her heartwarming visits to hospice patients and will become a therapy dog at Aurora Hospital in Grafton.

Partnering with Gracie is Mrs. Michel, a retired School Counselor with 29 years of experience in the Port Washington-Saukville School District. Together, they embark on a new journey focused on promoting kindness, respect, and happiness within our school community. With Gracie as her four-legged companion, Mrs. Michel is excited to collaborate with our students and staff. The possibilities for PAW-sitive impact are endless! 🐾

We're looking forward to the joy and warmth that Gracie will bring to our school each Wednesday! Gracie will be celebrating her second birthday in just a few weeks, so be sure to send Happy Birthday Wishes her way! 🎉

My First Communion Prayer:
I clasp my hands then kneel and pray
on this, my First Communion Day.
I ask you, Jesus, to watch me grow,
and teach me all I need to know.
Protect me, daily, from all things bad,
and fill my heart with all things glad.
And if I ever lose my ...way,
please guide me back
when I kneel and pray.

What a perfect way to end the week! Thank you to Mr. Jerome, Mr. Hubacek, & Mr. Didier for waking up extra early to prepare breakfast for our Faculty & Staff! We are so blessed to have amazing parents!