School of St. Mary
Diocesan school · Grades Pre-K–8
Lake Forest, IL
185 E Illinois Rd, Lake Forest, IL 60045
Overall grade: A+
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- AClass size
- A-Years serving families
- B+Diversity
What stands out
- Smaller classes than 67% of Catholic schools in Illinois
- Serving families in Lake Forest since at least 2011
School of St. Mary is a Catholic diocesan school in Lake Forest, Illinois, for students from pre-K through 8th grade. It has about 336 students and around 11 students per teacher, smaller classes than 67% of Catholic elementary schools in Illinois. It has been listed in official private school records since 2011–12. The school is part of the Archdiocese of Chicago. Students attend about 7 hours a day, 180 days a year.
At a glance
- Grades
- Grades Pre-K–8
- Students
- 336
- Teachers
- 30.6 (full-time equivalent)
- Students per teacher
- 11
- Boys and girls
- Coed · 168 girls, 168 boys
- Religious affiliation
- Catholic · Diocesan school
- Diocese
- Archdiocese of Chicago
- School day
- About 7 hours
- School year
- 180 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).
- Larger than 83% 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 School of St. Mary
What grades does School of St. Mary serve?
School of St. Mary serves grades Pre-K–8.
How many students attend School of St. Mary?
About 336 students, with 11 students per teacher, according to official records.
How much is tuition at School of St. Mary?
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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