About Us                                                                                    

Welcome to St. Mary School!

St. Mary School was founded in 1914 by the School Sisters of Notre Dame.  For over one hundred years, the “charism” of that religious community, which is “unity, and educating in all we do and world vision” continues to permeate who we are. 

Hopefully, you will take a few minutes to visit with us online and discover the great opportunities afforded to our students.  We pride ourselves on educating the whole child with a special emphasis on his or her religious formation in the Catholic faith.

You are always welcome to come and see our wonderful school and consider joining our great school family!

Take a look at the St. Mary School History!

St. Mary School 100 Years in Pictures
St. Mary School History

Ten Seconds Can Change Your Life Forever

Special event at St. John the Baptist Diocesan High School
Guest speaker - Bobby Petrocelli
Tuesday, 7 PM, November 7, 2017
Parents are encouraged to attend with their children, grades 5 & up
Click here for more information.


N.J.H.S Thanksgiving Food Drive

Help our neighbors in need this Thanksgiving season by donating non-perishable goods to Saint Mary School. Our National Junior Honor Society is hosting this drive and will donate the proceeds to those in need. 
Drive ends on Thursday, November 9th! 




*We are asking that our community at St. Mary School help to make their voice heard about Mandated Services in Catholic schools vs. public schools.*

This important message is from CSAANYS (Catholic School Administrators Association of New York State):
Take ACTION NOW – we need you all those who support Catholic Education!  We cannot stand idly by and be subjected to a 4% DECREASE in Mandated Services while public schools get a 4% INCREASE.  SPEAK OUT!  BE LOUD!  DEMAND passage of S.6089 and A.7833 before session adjourns.
Your input matters, it will take 2 minutes to send the email and tweet the information.

Go to


Fidelis Care is a Catholic-owned healthcare program supported by the US Conference of Catholic Bishops.  Fidelis has been very supportive of our Catholic schools and communities.  If you would like more information on their healthcare program, please click here.

News & Events                                                                        

This is the image for the news article titled Amazon Smile
arrowsAmazon Smile
We are now on Amazon Smile. Go to and search for St. Mary Church & School in East Islip. 0.5% of the purchase will support St. Mary
Read More about Amazon Smile

Quick Links                                                                               

UPCOMING EVENTS                  

NYS Catholic Conference 

Click the image to access the NYS Catholic Conference Website
NYS Catholic Conference


New York State Senate passes the bill.  
For more information click here for the article