For the 2025-26 school year, there are 2 private schools serving 501 students in East Islip, NY (there are 2 public schools, serving 764 public students). 40% 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 74%.
50% of private schools in East Islip, NY are religiously affiliated (most commonly Catholic).
Top Ranked East Islip Private Schools (2025-26)
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
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?
40% 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).
Recent Articles
Transferring from Public to Private School Mid-Year: What to Expect
Considering a mid-year transfer from public to private school? Learn what to expect with admissions, academic placement, social adjustment, and financial aid to ensure a smooth transition.
A Guide to Day vs. Boarding School: Which Is Right for Your Family
Discover the key differences between day and boarding schools to determine the best fit for your child. Explore benefits, costs, lifestyle factors, and questions to help guide your family’s decision.
The A to Z of Private Schools 2025
Explore the A to Z of private schools in 2025—from admissions to tuition—offering parents and educators clear insights into today’s options.