St. Mary School
Diocesan school · Grades Pre-K–6
Humboldt, IA
303 3rd Ave N, Humboldt, IA 50548
Overall grade: B
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- A-Class size
- B+Years serving families
- BDiversity
What stands out
- A Catholic school in Humboldt
In Humboldt, Iowa, St. Mary School is a Catholic diocesan school for students from pre-K through 6th grade. About 134 students attend, with roughly 11 students per teacher. The school is part of the Diocese of Sioux City. The school day runs about 6.5 hours, 180 days a year. Iowa has programs that can help pay tuition; ask the school whether it takes part.
At a glance
- Grades
- Grades Pre-K–6
- Students
- 134
- Teachers
- 12 (full-time equivalent)
- Students per teacher
- 11.2
- Boys and girls
- Coed · 74 girls, 60 boys
- Religious affiliation
- Catholic · Diocesan school
- Diocese
- Diocese of Sioux City
- School day
- About 6.5 hours
- School year
- 180 days
- Library
- Yes
Reviews
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How it compares
- Smaller classes than 55% of Catholic elementary schools in Iowa (11 students per teacher).
- A smaller school: fewer students than 58% of Catholic elementary schools in Iowa.
- Compared with 67 Catholic elementary schools in Iowa.
Students by survey year
Total students reported in official records since 2011–12.
Students by grade
Student body
Member of
- National Catholic Educational Association
Help paying tuition in Iowa
These state programs can help pay private school tuition. Only participating schools can accept them, so ask St. Mary School whether it takes part.
- Students First Education Savings Accounts · Education savings account
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–6.
How many students attend St. Mary School?
About 134 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. Iowa has programs that can help pay private school tuition; ask whether the school takes part.
Official record · Updated October 2026 · Official search · Something wrong? Tell us
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