St. Mary School
Diocesan school · Grades Pre-K–5
Alton, IL
536 E 3rd St, Alton, IL 62002
Overall grade: B+
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- A-Class size
- B+Years serving families
- A-Diversity
What stands out
- One of 2 Catholic schools in Alton
In Alton, Illinois, St. Mary School is a Catholic diocesan school for students from pre-K through 5th grade. About 166 students attend, with roughly 13 students per teacher. The school is part of the Diocese of Springfield. The school day runs about 7 hours, 176 days a year.
At a glance
- Grades
- Grades Pre-K–5
- Students
- 166
- Teachers
- 12.9 (full-time equivalent)
- Students per teacher
- 12.9
- Boys and girls
- Coed · 87 girls, 79 boys
- Religious affiliation
- Catholic · Diocesan school
- Diocese
- Diocese of Springfield
- School day
- About 7 hours
- School year
- 176 days
- Library
- Yes
Reviews
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How it compares
- A smaller school: fewer students than 54% 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–5.
How many students attend St. Mary School?
About 166 students, with 13 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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