Skip to main content

Average

#728 of 991 private schools in NY

St Mary School

Elementary School

16 HARRISON AVE, East Islip, NY 11730

Private Estimated Score

Estimated academic score. This school does not have standardized test data. Based on NY statewide data. Learn more

Enrollment

351

Student-Teacher

13.2:1

Score

5.6

Grades

Pre-K – 8th

Updated 2021-22

How this school compares

New York elementary schools

#343 of 486

About St Mary School

ST MARY SCHOOL is a public elementary school located on Harrison Avenue in East Islip, Suffolk County. Serving students from pre-kindergarten through eighth grade, the school has an enrollment of 351 and maintains a student-teacher ratio of 13.2:1 with 27 full-time equivalent teachers. While academic performance metrics are not available, ST MARY SCHOOL focuses on providing a supportive learning environment that encourages student development.

The school is situated in a large suburban area, offering students easy access to various amenities and recreational activities. East Islip’s community provides a welcoming setting for families seeking a nurturing educational experience with room for growth.

What Parents Should Know

As a private school, St Mary School operates independently from the local public school district. Families considering this school should inquire about tuition costs, financial aid availability, and the admissions process. Private schools are not required to follow the same curriculum standards as public schools, which can be either an advantage or a consideration depending on your priorities.

Compare to Public Schools

Beta

How St Mary School compares to the 2 public schools in East Islip, NY

Student-Teacher Ratio
13.2:1
This School
vs
11.4:1
Public Avg
Avg School Size
351
This School
vs
382
Public Avg
Avg School Scout Rating
5.6
This School
vs
7.5
Public Avg

Student Demographics

White 64.4% vs 0%
Hispanic 18.2% vs 0%
Black 10.3% vs 0%
Asian 0.9% vs 0%
St Mary School East Islip Public Avg

All Schools in East Islip

School Rating
St Mary School (this school) 5.6
JOHN F KENNEDY ELEMENTARY SCHOOL 7.0
TIMBER POINT ELEMENTARY SCHOOL 8.0

Demographics sourced from NCES Private School Survey (PSS) and Common Core of Data (CCD). Comparisons are based on enrollment-weighted averages.

Score Breakdown

What This Rating Measures

This rating reflects classroom size, instructional time, student diversity, community resources, and school characteristics. Private schools are ranked against other private schools in NY.

Classroom Attention
? Student-teacher ratio calibrated against other private schools. Lower ratios mean more individual attention. (30% of overall score)
C+ 4.0 / 10
View breakdown
Student-Teacher Ratio 13.2:1
Instructional Commitment
? Total annual instructional hours based on school day length and days per year. (15% of overall score)
C 3.4 / 10
View breakdown
School Day Length 6 hours
Annual Instructional Hours 1,080
Diversity & Inclusion
? Racial and ethnic diversity of the student body using Simpson's diversity index. (20% of overall score)
A- 7.9 / 10
View breakdown
Diversity Index 54%
Community Context

Data Unavailable

School Profile
? Enrollment size and grade span breadth — indicators of program depth and peer community. (15% of overall score)
A- 8.1 / 10
View breakdown
Enrollment 351
View data sources

Score basis: Private school model

Data coverage: 80% of scoring components had data

Components scored: 4 of 5

Ranking pool: Private schools in NY

Test Scores

Test score data not yet available for this school.

Student Demographics NCES PSS (SY 2021-22)

White 64.4%
Hispanic 18.2%
Black 10.3%
Two or More 5.7%
Asian 0.9%
Native American 0.3%
Pacific Islander 0.3%

Source: NCES Private School Survey (PSS)

Location

16 HARRISON AVE, East Islip, NY 11730

Nearby Alternatives

Families considering St Mary School may also want to explore other elementary schools in the area. MAUD S SHERWOOD ELEMENTARY SCHOOL (rated 8.7/10, 1.2 miles away, in nearby Islip), which scores notably higher. Another option is IDLE HOUR ELEMENTARY SCHOOL (rated 8.7/10, 2.3 miles away, in nearby Oakdale), which scores notably higher. Additionally, RUTH C KINNEY ELEMENTARY SCHOOL (rated 8.1/10, 1.8 miles away, in nearby Islip Terrace), which scores notably higher. For more schools in East Islip, see our East Islip schools guide .

Nearby Schools

20 within 4.0 mi
School Distance Rating
JOHN F KENNEDY ELEMENTARY SCHOOL East Islip 0.6 mi 7.0
WING ELEMENTARY SCHOOL Islip 1.1 mi 8.0
MAUD S SHERWOOD ELEMENTARY SCHOOL Islip 1.2 mi 8.7
TIMBER POINT ELEMENTARY SCHOOL East Islip 1.3 mi 8.0
EAST ISLIP MIDDLE SCHOOL Islip Terrace 1.6 mi 6.9
EAST ISLIP HIGH SCHOOL Islip Terrace 1.6 mi 8.4
ISLIP HIGH SCHOOL Islip 1.3 mi 8.1
RUTH C KINNEY ELEMENTARY SCHOOL Islip Terrace 1.8 mi 8.1
ISLIP MIDDLE SCHOOL Islip 1.4 mi 6.7
COMMACK ROAD ELEMENTARY SCHOOL Islip 1.7 mi 5.7
CONNETQUOT ELEMENTARY SCHOOL Islip Terrace 2.2 mi 8.0
IDLE HOUR ELEMENTARY SCHOOL Oakdale 2.3 mi 8.7
LORETTA PARK ELEMENTARY SCHOOL Brentwood 2.8 mi 4.8
LAUREL PARK ELEMENTARY SCHOOL Brentwood 2.8 mi 5.2
SOUTHEAST ELEMENTARY SCHOOL Brentwood 3.0 mi 6.2
BROOK AVENUE ELEMENTARY SCHOOL Bay Shore 2.7 mi 6.2
FRANCIS J O'NEILL SCHOOL Central Islip 3.5 mi 6.7
MARGUERITE L MULVEY SCHOOL Central Islip 3.5 mi 6.8
CORDELLO AVENUE ELEMENTARY SCHOOL Central Islip 3.8 mi 5.3
OUR LADY OF GUADALUPE EAST Central Islip 4.0 mi 5.2

Neighborhood Census ACS (2019-2023)

Census data for ZIP 11730 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$146,190

Median Home Value

$577,600

Median Rent

$2,508/mo

Population

14,376

College Educated

38.9%

Homeownership

85%

Avg Commute

30.7 min

Poverty Rate

4.5%

Median Age

41.5

Community Profile

The community surrounding St Mary School has a median household income of $146,190. It is an area where 39% of adults hold a bachelor's degree or higher. The median home value in the area is $577,600, with a median rent of $2,508/month. The local poverty rate of 4.5% is relatively low. The average commute for residents is 31 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.

Similar Schools

Schools in the same state with comparable level, size, and ratings

School Rating
ALDEN TERRACE SCHOOL Valley Stream, NY 5.6
BNEI YAKOV YOSEF OF MONSEY Spring Valley, NY 5.6
BROADWAY ELEMENTARY SCHOOL Elmira, NY 5.6
CATO-MERIDIAN ELEMENTARY SCHOOL Cato, NY 5.6
CLINTON V BUSH ELEMENTARY SCHOOL Jamestown, NY 5.6
DOVER ELEMENTARY SCHOOL Dover Plains, NY 5.6

Frequently Asked Questions

Common questions about St Mary School

What grades does St Mary School serve?

St Mary School serves students in grades Pre-K through 8th.

How many students attend St Mary School?

St Mary School has an enrollment of approximately 351 students.

What is the student-teacher ratio at St Mary School?

The student-teacher ratio at St Mary School is 13.2:1. 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 NY?

St Mary School is ranked #728 out of 991 private schools in NY.

What is St Mary School's MySchoolScout rating?

St Mary School has a composite rating of 5.6 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.

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.

Explore More Schools

All schools in East Islip, NY Schools in NY 20 nearby schools
11 schools nearby View map →

Quick Facts NCES PSS (SY 2021-22)

Grades
Pre-K – 8th
Enrollment
351
Gender Split
51% M / 49% F
Student-Teacher Ratio
13.2:1
Teachers (FTE)
27
Type
private
Coed Status
coed
Affiliation
Roman Catholic
School Day
6 hours
Days Per Year
180 days
Setting
Large Suburb
County
SUFFOLK
Phone
(631) 581-3423
Data Year
2022–2023

Resources & Links

Search for School Website ↗ Google Maps & Reviews ↗ GreatSchools Profile ↗ Niche Reviews ↗ Official NCES Data ↗

How We Rate Schools

Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.

Read our full methodology
Data sources
NCES PSSSY 2021-22Census ACS2019-2023AI descriptionMySchoolScout Rankings2024 Full details →

Related reading

Get school insights in your inbox

New rankings, best-schools lists, and parent guides — delivered free. No spam, unsubscribe anytime.

We respect your privacy. Unsubscribe at any time.