St. Petronille School
Diocesan school · Grades Pre-K–8
Glen Ellyn, IL
425 Prospect Ave, Glen Ellyn, IL 60137
Overall grade: B-
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- B-Class size
- A-Years serving families
- BDiversity
What stands out
- Serving families in Glen Ellyn since at least 2011
St. Petronille School is a Catholic diocesan school in Glen Ellyn, Illinois, for students from pre-K through 8th grade. It has about 493 students and around 18 students per teacher. It has been listed in official private school records since 2011–12. The school is part of the Diocese of Joliet. Students attend about 6 hours a day, 176 days a year.
At a glance
- Grades
- Grades Pre-K–8
- Students
- 493
- Teachers
- 26.9 (full-time equivalent)
- Students per teacher
- 18.3
- Boys and girls
- Coed · 259 girls, 234 boys
- Religious affiliation
- Catholic · Diocesan school
- Diocese
- Diocese of Joliet
- School day
- About 6 hours
- School year
- 176 days
- Library
- Yes
Reviews
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How it compares
- Larger than 97% of Catholic elementary schools in Illinois.
- Compared with 285 Catholic elementary schools in Illinois.
Students by survey year
Total students reported in official records since 2011–12.
Students by grade
Student body
Member of
- National Catholic Educational Association
Questions to ask on a tour
- What is tuition, and what does it include (books, fees, uniforms, trips)?
- Do you offer financial aid, sibling discounts or payment plans?
- Do you accept ESA, voucher or tax-credit scholarship funds?
- How big are classes in my child's grade?
- What support is there for students who need extra help or more challenge?
- Is the school accredited, and by whom?
- What do a typical day and a typical week look like?
- How does the school communicate with families?
Questions about St. Petronille School
What grades does St. Petronille School serve?
St. Petronille School serves grades Pre-K–8.
How many students attend St. Petronille School?
About 493 students, with 18 students per teacher, according to official records.
How much is tuition at St. Petronille School?
Call the school to ask about tuition, financial aid and payment plans.
Official record · Updated October 2026 · Official search · Something wrong? Tell us
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