The brief
A private high school in Syosset, NY serving grades 9th – 12th.
It ranks 144 of 1,127 schools in New York.
Our Lady of Mercy Academy 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 datarating: low confidence · 3 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.
- Estimated academic score. This school does not have standardized test data. Based on 9 schools in Syosset. 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 NY.
- Component weights adjusted due to data availability.
Score basis: private school model. Data coverage: 80% of scoring components had data. Components scored: 4 of 5. Ranking pool: private schools in NY.
- 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.
- 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 11791; this does not measure the attendance area.
Evidence periods: Rating mixed/unknown input periods; assessments vintage unavailable; directory SY 2023–24
The neighborhood
Where it sits, and what the area looks like.Open the New York school map to see school quality against home prices across the metro.
The area
- Median income
- $204,357
- Median home value
- $918,900
- Median rent
- $3,091/mo
- College educated
- 70.6%
- Homeownership
- 92.8%
- Poverty rate
- 3.5%
U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 11791; this is area context, not an attendance boundary.
Getting around
- Walk Score
- 19
- Car-Dependent
- Bike Score
- 20
- Somewhat Bikeable
- County reported crime
- 1,006/100K
- Reported Part-1 offenses (violent + property + arson) per 100,000 county residents, counting every city police department, sheriff's office and county police department that reported a full year to the FBI Uniform Crime Reporting program. Shown only where those agencies cover at least 80% of the county's residents. Not a school safety rating.
Walk, transit and bike scores by
FBI Uniform Crime Reporting · 2025 · county context, not school-level safety or attendance eligibility. Source details
Programs and who goes here
What the campus offers, and who it enrolls.Who goes here
- White66%
- Hispanic21%
- Black5%
- Asian5%
- Two or More3%
Enrollment mix: NCES Private School Universe Survey (PSS).
Compare nearby
Grade-compatible schools using the same rating model.- 7.8Compare →
- Our Lady of Mercy Academy7.6
- 7.3Compare →
- 6.4Compare →
- 6.2Compare →
- not ratedCompare →
- not ratedCompare →
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 Our Lady of Mercy Academy serve?
Our Lady of Mercy Academy serves students in grades 9th through 12th.
How many students attend Our Lady of Mercy Academy?
Our Lady of Mercy Academy has an enrollment of approximately 195 students.
What is the student-teacher ratio at Our Lady of Mercy Academy?
The student-teacher ratio at Our Lady of Mercy Academy is 7.1:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.
How does Our Lady of Mercy Academy rank in NY?
Our Lady of Mercy Academy ranks #144 of 1,127 private schools in NY.
What is Our Lady of Mercy Academy's MySchoolScout rating?
Our Lady of Mercy Academy has a current MySchoolScout rating of 7.6 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
Is Our Lady of Mercy Academy a private school?
Yes, Our Lady of Mercy Academy is a private all-girls 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 Our Lady of Mercy Academy a religious school?
Our Lady of Mercy Academy has a Roman Catholic religious affiliation.
School facts
- Grades
- 9th – 12th
- Enrollment
- 195
- Gender split
- 0% M / 100% F
- Student-teacher ratio
- 7.1:1
- Teachers (FTE)
- 28
- Type
- Private
- Coed status
- All-Girls
- Affiliation
- Roman Catholic
- School day
- 7 hours
- Days per year
- 180 days
- Setting
- Large Suburb
- County
- Nassau County
- Phone
- (516) 921-1047
- Area population (ZIP 11791)
- 25,194
- Area average commute
- 39.5 min
- Area median age
- 43
NCES Private School Universe Survey (PSS) (SY 2023–24).
Sources and official links
Keep exploring
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Data from NCES Common Core of Data, New York State Education Dept., and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.