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

All St. Mary School Families must complete an online AdvancED survey at


To download and print the AdvancED form shown above CLICK HERE


*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                  

To Celebrate the 25th Anniversary of the Catechism of the Catholic Church, a special episode of ​Encounter​ with Bishop Barres will air on October 11th, 2017 at 10:30 PM on Telecare (Cable channels 29 and 137, Fios channel 296). Additionally, there will be a special feature about this in the ​Long Island Catholic​. 

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