The brief
A private elementary school in Humboldt, IA serving grades Pre-K – 6th.
It ranks 93 of 170 schools in Iowa.
St Mary School is a private school: it enrolls by application and tuition, and its rating comes from the private-school model, which is not comparable with a public rating.
- 202594%
About this school's datarating: low confidence · 5 sources, 2019–2025
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, an estimate, or describes a surrounding area rather than the school, that limitation is named here.
- Estimated academic score. This school does not have standardized test data. Based on IA statewide data. Learn more
- What this rating measures: classroom size, instructional time, student diversity, community resources, and school characteristics. Private schools are ranked against other private schools in IA.
- Component weights adjusted due to data availability.
Multi-year averages used by the rating model: math 94% (2025 ISASP) · reading/ELA 94% (2025 ISASP).
Score basis: private school model. Data coverage: 80% of scoring components had data. Components scored: 4 of 5. Ranking pool: private schools in IA.
- School directory (enrollment, grades, staff, contact)
- NCES Private School Universe Survey (PSS) · SY 2023–24 · Low confidence
- Vintage not available. Do not use this measure alone.
- MySchoolScout rating and rank
- MySchoolScout ranking model · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived as a weighted blend of the component scores shown in Academics from state assessment, EdFacts growth, and NCES resource records.
- Math proficiency
- State department of education · 2025 ISASP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2025 ISASP. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Reading/ELA proficiency
- State department of education · 2025 ISASP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2025 ISASP. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Neighborhood (income, housing, education)
- U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
- Older source: ACS 2019–2023 5-year estimates. Use as historical context.
- Reported for the ZCTA for ZIP 50548; this does not measure the attendance area.
Evidence periods: Rating mixed/unknown input periods; assessments 2025 ISASP; directory SY 2023–24
The neighborhood
Where it sits, and what the area looks like.The area
- Median income
- $71,043
- Median home value
- $177,700
- Median rent
- $731/mo
- College educated
- 25.1%
- Homeownership
- 71%
- Poverty rate
- 13.4%
U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 50548; this is area context, not an attendance boundary.
Getting around
- Walk Score
- 50
- Somewhat Walkable
- Bike Score
- 49
- Somewhat Bikeable
Walk, transit and bike scores by
Programs and who goes here
What the campus offers, and who it enrolls.Who goes here
- White92%
- Hispanic7%
- Asian1%
Enrollment mix: NCES Private School Universe Survey (PSS).
The record
What is on file, and where each number came from.Questions families ask
What grades does St Mary School serve?
St Mary School serves students in grades Pre-K through 6th.
How many students attend St Mary School?
St Mary School has an enrollment of approximately 134 students.
What is the student-teacher ratio at St Mary School?
The student-teacher ratio at St Mary School is 11.2:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.
How does St Mary School rank in IA?
St Mary School ranks #93 of 170 private schools in IA.
What is St Mary School's MySchoolScout rating?
St Mary School has a current MySchoolScout rating of 6.2 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at St Mary School?
Based on loaded state assessment records, St Mary School has 94% math proficiency (2025 ISASP) and 94% reading/ELA proficiency (2025 ISASP).
Is St Mary School a private school?
Yes, St Mary School is a private coeducational school with a Roman Catholic affiliation. Private schools are not required to participate in state standardized testing, so academic performance data may be limited compared to public schools.
Is St Mary School a religious school?
St Mary School has a Roman Catholic religious affiliation.
School facts
- Grades
- Pre-K – 6th
- Enrollment
- 134
- Gender split
- 45% M / 55% F
- Student-teacher ratio
- 11.2:1
- Teachers (FTE)
- 12
- Type
- Private
- Coed status
- Coed
- Affiliation
- Roman Catholic
- School day
- 6.6 hours
- Days per year
- 180 days
- Setting
- Remote Town
- County
- Humboldt County
- Phone
- (515) 332-2134
- Area population (ZIP 50548)
- 5,482
- Area median age
- 41.5
NCES Private School Universe Survey (PSS) (SY 2023–24).
Related reading
Data from NCES Common Core of Data, Iowa Dept. of Education, and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.