For the 2026 school year, there are 2 private schools serving 501 students in East Islip, NY (there are 2 public schools, serving 786 public students). 39% of all K-12 students in East Islip, NY are educated in private schools (compared to the NY state average of 15%).
The top-ranked private schools in East Islip, NY include St. Mary School and Harrow International School New York.
The average acceptance rate is 53%, which is lower than the New York private school average acceptance rate of 75%.
50% of private schools in East Islip, NY are religiously affiliated (most commonly Catholic).
Top-Ranked East Islip Private Schools (2026)
School
Location
Quick Facts
500 Montauk Highway
East Islip, NY 11769
(631) 869-1572
East Islip, NY 11769
(631) 869-1572
Gr: 6-12 Avg. class size: 8 students Sports: 11 Tuition & acceptance rate listed
St. Mary School
(Catholic)
16 Harrison Ave
East Islip, NY 11730
(631) 581-3423
East Islip, NY 11730
(631) 581-3423
Gr: PK-8 | 501 students Tuition & acceptance rate listed
East Islip, New York Private Schools (Closed)
School
Location
Quick Facts
Chatterbox Day School (Closed 2015)
Daycare / Preschool
52 Hawthorne Ave
East Islip, NY 11730
(631) 581-4756
East Islip, NY 11730
(631) 581-4756
Gr: PK-1 | 61 students
74 Suffolk Lane
East Islip, NY 11730
(631) 581-1035
East Islip, NY 11730
(631) 581-1035
Gr: PK-12 | 63 students
Overview
This Town (East Islip)
This State (NY)
# Schools
2 Schools
Student Body:
# Students
501 Students
425,275 Students
% Average Students of Color
32%
39%
Academics and Faculty:
# Teachers
42 Teachers
41,640 Teachers
Average Student-Teacher Ratio
19:1
10:1
% Average Faculty w/Advanced Degree
90%
76%
Average Class Size
8 students
15 students
Tuition and Acceptance Rate:
Average Yearly Tuition Cost
$43,350
$22,353
Average Acceptance Rate
53%
75%
Students by Ethnicity:
Diversity Score
0.67
0.59
# American Indian Students
1 Student
949 Students
% American Indian Students
n/a
n/a
# Asian Students
3 Students
18,401 Students
% Asian Students
1%
5%
# Hispanic Students
64 Students
33,760 Students
% Hispanic Students
13%
8%
# Black Students
36 Students
33,699 Students
% Black Students
7%
8%
# White Students
226 Students
253,643 Students
% White Students
45%
60%
# Hawaiian Students
1 Student
538 Students
% Hawaiian Students
n/a
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
170 Students
81,729 Students
% of Others Students
34%
19%
All Ethnic Groups
Extracurriculars and Sports:
Average Number of Sports
11 sports
7 sports
Frequently Asked Questions
What are the top-ranked private schools in East Islip, NY?
The top-ranked private schools in East Islip, NY include St. Mary School and Harrow International School New York.
How many private schools are located in East Islip?
2 private schools are located in East Islip.
What percentage of students in East Islip go to private school?
39% of all K-12 students in East Islip are educated in private schools (compared to the NY state average of 15%).
What percentage of private schools are religiously affiliated in East Islip?
50% of private schools in East Islip are religiously affiliated (most commonly Catholic).
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