The brief
A private elementary school in Winchester, MA serving grades Pre-K – Kindergarten.
St Mary's 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.
About this school's data2 sources, 2019–2024
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.
- Based on limited data: 0% component coverage.
- We don't have enough verified data to rate this school fairly. Private schools in MA aren't required to report standardized test scores to the state, which limits the data available for our rating model. Our rating model requires at least 2 of 3 data components (academics, student progress, college readiness, and resources) to generate a meaningful score. Schools below this threshold receive a Limited Profile to avoid misleading ratings. Learn more about our methodology
- 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.
- 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 01890; this does not measure the attendance area.
Evidence periods: Rating not displayed; assessments vintage unavailable; directory SY 2023–24
The neighborhood
Where it sits, and what the area looks like.Open the Boston school map to see school quality against home prices across the metro.
The area
- Median income
- $218,176
- Median home value
- $1,181,700
- Median rent
- $2,271/mo
- College educated
- 78.4%
- Homeownership
- 83.4%
- Poverty rate
- 3.9%
U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 01890; this is area context, not an attendance boundary.
Getting around
- Walk Score
- 86
- Very Walkable
- Bike Score
- 73
- Very Bikeable
- City reported crime
- 426/100K
- Reported Part-1 offenses (violent + property + arson) per 100,000 residents, from the FBI Uniform Crime Reporting program for Winchester. This is a city-level reported-crime measure, not a school safety rating.
Walk, transit and bike scores by
FBI Uniform Crime Reporting · 2025 · city context (Winchester), not school-level safety or attendance eligibility. Source details
Source period: 2025. Freshness not available.
Programs and who goes here
What the campus offers, and who it enrolls.Who goes here
- White83%
- Black17%
Enrollment mix: NCES Private School Universe Survey (PSS).
Compare nearby
Grade-compatible schools using the same rating model.- 7.5Compare →
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- not ratedCompare →
- St Mary's Schoolnot rated
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Distance is proximity only; it is not attendance eligibility.
Private · tuition: Potential private option; tuition and admission requirements have not been verified.
The record
What is on file, and where each number came from.Questions families ask
What grades does St Mary's School serve?
St Mary's School serves students in grades Pre-K through Kindergarten.
How many students attend St Mary's School?
St Mary's School has an enrollment of approximately 12 students.
What is the student-teacher ratio at St Mary's School?
The student-teacher ratio at St Mary's School is 12:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.
Is St Mary's School a private school?
Yes, St Mary's 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's School a religious school?
St Mary's School has a Roman Catholic religious affiliation.
School facts
- Grades
- Pre-K – Kindergarten
- Enrollment
- 12
- Gender split
- 100% M / 0% F
- Student-teacher ratio
- 12:1
- Teachers (FTE)
- 1
- Type
- Private
- Coed status
- Coed
- Affiliation
- Roman Catholic
- School day
- 6 hours
- Days per year
- 175 days
- Setting
- Large Suburb
- County
- Middlesex County
- Phone
- (781) 729-5515
- Area population (ZIP 01890)
- 22,862
- Area average commute
- 30.8 min
- Area median age
- 43
NCES Private School Universe Survey (PSS) (SY 2023–24).
Sources and official links
Keep exploring
Related reading
Data from NCES Common Core of Data, Mass. Dept. of Elementary & Secondary Education, and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.