Never hesitate to hold out your hand; never hesitate to accept the outstretched hand of another.
-Pope St. John XXIII

Principal's Welcome

Welcome to SJ23!

Thank you for taking the time to peruse our website. This virtual tour will give you an idea of who we are – but I hope you will call to arrange a visit with us. When you step on our campus, you will feel the excitement of learning, the expansive freedom that comes from our 35-acre campus, and the welcoming warmth from our faculty and students.

Since 2004, we have held fast to our motto Parare Mente et Corde, to prepare in mind and heart, and are proud of our longstanding tradition of academic achievement that includes National Merit Finalists and Advanced Placement scholars. We can boast countless competitive sports programs, successful fine and performing arts, and wonderful opportunities for spiritual growth. We also have a robust House system; the five Houses are comprised of students from all grade levels and led by seniors. The Houses compete throughout the year for the prized Roncalli Cup.

Most importantly, we educate young men and women who will be fully prepared for life's challenges and who will know and understand the teachings of the Catholic Church.

Come see us and learn more about what SJ23 has to offer!

Yours in Christ,

Joseph Noonan
Interim Principal
Our History
In 2001, a group of community leaders joined forces with Monsignor Joe H. Crosthwait and Monsignor Ed Randall and took a giant leap of faith. Soon, they were joined by others who believed in the leadership team and its purpose and vision for the future. 

Pope John XXIII High School opened in 2004, the first new Catholic high school in the Houston area in more than 40 years – a refreshing new model of hope for the future of Catholic secondary education.
Our Philosophy
As a Catholic college preparatory, we are dedicated to the mission of the Catholic Church to share the teachings of Jesus Christ. We are a community whose vocation is to educate and form the mind, body, spirit, and imagination of our students.

Our community is encouraged to develop the gifts given to them by the Holy Spirit. Our students are taught to seek the truth and develop a love for wisdom. Students learn to imitate the merciful love of Jesus Christ in a life of service to others. 
Our Vision
St. John XXIII College Preparatory develops and inspires students in mind, body, spirit, and imagination through Catholic education. We prepare young men and women for life's challenges, to live lives of integrity, and to understand the teachings of the Catholic Church.
Our Mission
We prepare the hearts and minds of our students to serve God and others.


Parare Mente et Corde

St. John XXIII College Preparatory

1800 W. Grand Parkway N., Katy, Texas 77449
281.693.1000
Fax: 281.693.1001
Our Mission
We prepare the hearts and minds of our students to serve God and others.