St. Mark School
Diocesan school · Grades Pre-K–8
Peoria, IL
711 N Underhill St, Peoria, IL 61606
Overall grade: A+
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- A-Class size
- A-Years serving families
- ADiversity
What stands out
- Serving families in Peoria since at least 2011
St. Mark School is a Catholic diocesan school in Peoria, Illinois, for students from pre-K through 8th grade. It has about 153 students and around 13 students per teacher. Its enrollment has held steady since 2011–12. The school is part of the Diocese of Peoria. Students attend about 7 hours a day, 176 days a year.
At a glance
- Grades
- Grades Pre-K–8
- Students
- 153
- Teachers
- 12 (full-time equivalent)
- Students per teacher
- 12.8
- Boys and girls
- Coed · 65 girls, 88 boys
- Religious affiliation
- Catholic · Diocesan school
- Diocese
- Diocese of Peoria
- 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 63% 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. Mark School
What grades does St. Mark School serve?
St. Mark School serves grades Pre-K–8.
How many students attend St. Mark School?
About 153 students, with 13 students per teacher, according to official records.
How much is tuition at St. Mark 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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