St. Mary School
Parish school · Grades Pre-K–8
Centralia, IL
424 E Broadway, Centralia, IL 62801
Overall grade: A
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- AClass size
- A-Years serving families
- B+Diversity
What stands out
- The only Catholic school in Centralia
- Smaller classes than 67% of Catholic schools in Illinois
- Growing: enrollment up 22% since 2011–12
- Serving families in Centralia since at least 2011
In Centralia, Illinois, St. Mary School is a Catholic parish school for students from pre-K through 8th grade. About 98 students attend, with roughly 11 students per teacher, smaller classes than 67% of Catholic elementary schools in Illinois. Enrollment is up about 23% since 2011–12. The school is part of the Diocese of Belleville. The school day runs about 7 hours, 176 days a year.
At a glance
- Grades
- Grades Pre-K–8
- Students
- 98
- Teachers
- 9.1 (full-time equivalent)
- Students per teacher
- 10.8
- Boys and girls
- Coed · 36 girls, 62 boys
- Religious affiliation
- Catholic · Parish school
- Diocese
- Diocese of Belleville
- School day
- About 7 hours
- School year
- 176 days
- Library
- Yes
Reviews
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How it compares
- Smaller classes than 67% of Catholic elementary schools in Illinois (11 students per teacher).
- A smaller school: fewer students than 85% 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. Mary School
What grades does St. Mary School serve?
St. Mary School serves grades Pre-K–8.
How many students attend St. Mary School?
About 98 students, with 11 students per teacher, according to official records.
How much is tuition at St. Mary 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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