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Seneca Middle School

850 Main Street
Holbrook, NY 11741
Principal: Gemma M. Salvia
Assistant Principal: Heather Stumpf
Assistant Principal: Georgia Afxendiou
Phone: (631) 471-1850

Be Kind. Be Honest. Be Humble. Be your Best.  

Winners of Awards

  • Winners:
  • The Suffolk County Executive Public Service Award: Sophia E.
  • Attorney General Triple “C” Award: Emily A.
  • New York State Comptroller Award: Ryan C.


Final Exam Schedule

New Bell Schedule - Please Note: School begins at 7:50am and ends at 2:40pm


Seneca Clubs 2022-2023 - View the list of clubs for this school year

May Club Dates 

Student Handbook 2022-2023 - View the student handbook


Join the 2022-2023 Seneca MS PTA via the Membership Form

Students who Make a Difference 2023



Students who make a difference group photo









We celebrate our students of the year.

Students of the Year


Students of the Month

MAY 2023




Students of the Month and their nominating teachers:

Grade 6 – Natalia T.L.

Grade 7 – Colin P.

Grade 8 – Alex T.


Club Information

National Junior Honor Society Requirement Process

National Junior Honor Society Activities Form

Seneca PTA Fundraiser

 Student Handbook 

Important Phone Numbers and Information 


Seneca's Newspaper is here!





Just a reminder, students will not be released to anyone if the person is not listed on the emergency card.
If changes need to be made on the card, please send in a revised one in to the main office. Thank you!



Mission Statement

The Seneca Middle School community will foster the intellectual, emotional, and physical growth of every child
by developing a positive self-image, a strong desire for learning, and a sense of respect for self and others.
We will accomplish this by providing a challenging curriculum in a safe and supportive atmosphere,
as our children mature into productive citizens.




Follow us on Twitter @SachemSenecaMS
Like us on Facebook @ Seneca Middle School - authorized
Follow us on Instagram @ seneca_ms


In the News

Seneca Middle School Supports Make-A-Wish

Seneca Middle School teacher Michael Dreyhaupt and student Sophia Espiritu holding big check thumbnail246359

Seneca Middle School raised $6,575 for the Make-A-Wish Foundation throughout the month of March. Several classes and student organizations held drives and fundraisers to raise money for the cause. Seneca Middle School teacher Michael Dreyhaupt and student Sophia Espiritu were both Make-A-Wish recipients and presented the check to the foundation during the building’s faculty meeting on May 10.

Date Added: 5/12/2023


No backpack items are currently available.

Upcoming Events