• May

    Valedictorian & Salutatorians

    St. John XXIII is proud to announce the class of 2019 valedictorian, Caitlyn Louise Cano and salutatorians, Abby Faye Hollman and Adley Grace Marsh.
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  • All Student Physicals

    All students must have a physical that is signed by a physician for the 2019-20 school year. 
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  • Book Buyback

    Seniors - Friday, May 24, 8-2

    All School - Thursday, May 30, 8-3

    Click here to create a Quote

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  • Tuition

    Reminder! Tuition for the 2019-2020 year must be either paid in full or a payment plan arranged through Smart Tuition no later than May 20.
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  • Cheer Team Celebrates

    The SJ23 cheer team competed in the Cheer America Platinum Championship at NRG Center and walked away with the Best Jumps award, first place in their division, and Grand Champion in the school team category! We are extremely proud of their hard work and accomplishment. Go lions!
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  • April

    Senior Art Show

    Saturday, May 4, 2019 - 10AM - 12PM Senior art students will showcase their skills in the Little Gallery at The University of St. Thomas in Houston.
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  • SJ23 Art Car Wins

    The Treasure of Smaug won 3rd place over all in the Art Car Parade! 

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  • March

    Graduation News!

    A representative from Houston Graduation Center will be on campus on Wednesday, April 17 beginning at 7:15 a.m. in the Student Center.
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  • Prom 2019

    2019 Prom - MEMORIES - TICKETS on Sale now - READ for all Information!
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  • Class of 2019 Acceptances!

    Congratulations to the CLASS OF 2019 COLLEGE ACCEPTANCES as of March 19, 2019. We will post an updated list next month.
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  • Theatre‚Äôs Spring Production

    Get your tickets NOW -
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  • Golf Highlights

    Congratulations to our Girls' Golf team! Fighting through the cold, wind and rain, they finished 2nd at yesterday's Village Golf Tournament.
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  • February

    Serving Others

    Led by student Isabelle Rose, the Fashion Club & Earth Club joined forces to put old fabric to good use.

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  • Congratulations Elena

    Elena Welsh ’19, received awards in the annual Harris County Scholastic Writing contest.

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  • Steps 4 Students

    Despite the weather, students and faculty had a great time at Steps for Students this weekend.
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  • Welcome Preston Smith

    The SJ23 Athletic Department is pleased to welcome Preston Smith as the Head Volleyball Coach.
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  • Congrats SJ23 Swim Team

    Both the Boys and Girls swimmers had stellar performances at the TAPPS Swimming State Championship Meet!
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  • Congratulations Aliya Mulati

    Congratulations to one of our first year International Student graduates, Aliya Mulati.
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  • Crowd Pleasers Dance

    The Crimson Cadets Dance Team competed at Bridgeland High School in Cypress.
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  • January

    Works of Mercy Projects

    School Sponsored Works of Mercy Projects!

    To sign up for the school-sponsored projects, please email Lauren Guido
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  • NHS News

    Congratulations to our most recent National Honor Society Officer inductees!

    From the left: Abigail Schurbusch (Historian), Alina Ramon (Treasurer), Abby Hollmann (President), Meagan Shively (Vice President), and Gina Boselli (Secretary)
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  • Steps 4 Students

    The Steps for Students 5K is an annual Archdiocesan-wide event that raises awareness of Catholic education and provides much-needed funds for our Catholic Schools.

    We are excited once again to participate in Steps for Students. This year's race is on February 16, 2019.
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< 2019
Parare Mente et Corde

St. John XXIII College Preparatory

1800 W. Grand Parkway N., Katy, Texas 77449
Fax: 281.693.1001

Our Mission
We prepare the hearts and minds of our students to serve God and others.