St. Mary School
Parish school · Grades Pre-K–8
DeKalb, IL
210 Gurler Rd, DeKalb, IL 60115
Overall grade: B
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- BClass size
- B+Years serving families
- A-Diversity
What stands out
- A Catholic school in DeKalb
St. Mary School is a Catholic parish school in DeKalb, Illinois, for students from pre-K through 8th grade. It has about 203 students and around 16 students per teacher. The school is part of the Diocese of Rockford. Students attend about 7 hours a day, 176 days a year.
At a glance
- Grades
- Grades Pre-K–8
- Students
- 203
- Teachers
- 12.6 (full-time equivalent)
- Students per teacher
- 16.1
- Boys and girls
- Coed · 91 girls, 112 boys
- Religious affiliation
- Catholic · Parish school
- Diocese
- Diocese of Rockford
- School day
- About 7 hours
- School year
- 176 days
- Library
- Yes
Reviews
Be the first to share what you love about St. Mary School.
How it compares
- Larger than 65% 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 203 students, with 16 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
Other private schools nearby
St. Mary Catholic School
Diocesan school · Grades Pre-K–7
Smaller classes than 87% of Catholic schools in Illinois
Sycamore, IL7.5 mi
Aurora Christian Schools Cornerstone Campus
Christian school (nondenominational) · Grades K–8
Serving families in Sycamore since at least 2011
Sycamore, IL8.1 mi
Northwester Center for Autism
Special education school · Grades Pre-K–12
Small classes: about 7 students per teacher
Genoa, IL15 mi