St. John XXIII College Preparatory
1800 W. Grand Parkway N., Katy, TX 77449
At a glance
Tuition & Aid
$22,100 2026-27 rate. Offers need-based aid and merit scholarships.
Merit Scholarships
SJ23 Merit Scholarship for students demonstrating excellence
Athletics
13 sports offered.
Sibling Discount
2nd student $17,680 ($4,420 off)
Admissions dates
Admissions requirements
- Entrance exam: ISEESchool code 570048; 9th grade. 11th/12th transfers submit PSAT. Last cycle: opened Sept 1, deadline Jan 15, docs Jan 31, rolling after.
- Teacher recommendations (school forms) + official transcripts
- Interviews for transfers only
Tuition & financial aid
2026-27 rate
Payment plans
- 1 payment (no fee)
- 2 payments (+$100)
- 10 payments May-Feb (+$200)
- Sibling discount
- 2nd student $17,680 ($4,420 off)
Need-based aid
Clarity ($60 fee); aid families also apply for TEFA (doesn't reduce SJ23 aid) and complete 10-40 volunteer hours
Merit scholarships
SJ23 Merit Scholarship for students demonstrating excellence
Additional costs
| Item | Amount | When | Notes |
|---|---|---|---|
| New Student Enrollment Fee | $500 | One-time | — |
| Financial aid application (Clarity) | $60 | One-time | optional |
Academics
AP courses
Languages
Athletics
13 sports
League: TAPPS 6A, District 4 (2024-26 alignment)
Faith & community
- Affiliation
- Catholic — Archdiocese of Galveston-Houston
- Mass
- Weekly all-school Mass — Day not published; moves for Solemnities and Holy Days. Students attend in full Mass uniform.
- Service hours
- Freshmen 20 · Sophomores 25 · Juniors 25 · Seniors 30 (per year, with due dates each spring)
- Retreats
- Mandatory class retreats (Oboedientia/Pax/Virtus/Renovatio) + optional Kairos (jr/sr) and Quest (fr/so); daily Mass + weekly all-school Mass
School life
Enrollment (federal)
432
NCES PSS 2023-24. Katy campus.
Student:Teacher (federal)
11.3:1
NCES 2023-24: 432 / 38.1 FTE
- Dress code
- Sue Mills uniforms; red or black logo sweater/vest/cardigan
College outcomes
~100% four-year college acceptance; Class of 2023 earned $11M+ in scholarships
Every fact above is drawn from official school information and carries its own source link and verification date. “Not Published” means we could not verify it from an official source — it does not mean the school doesn't offer it. Always confirm important details directly with the school.