Contact Us

Contact the Suffolk Federal Call Center, email* us at, visit our FAQs, or visit any of our eight convenient branch locations located on Long Island in Suffolk County, NY to speak to one of our Member Services Representatives.

* Electronic mail is not secure; confidential or personal information should not be communicated in this manner. Do not include account numbers, social security numbers, personal identification numbers (PINs), passwords, or other confidential information in your email.

Call Center/Main Number

Call Center/Main Toll Free (out-of-area)

Member Telephone Service (MTS) PDF File Download
631.924.SFCU (7328) 

Member Telephone Service (MTS) Toll Free

Main Fax
Telecommunication Device for the Deaf

Contact Us By Email*
Contact Us By Mail
Suffolk Federal
3681 Horseblock Road
PO Box 9005
Medford, New York 11763   

Email Security: Protecting Your Privacy and Information through Secured Messages
Suffolk Federal’s Advanced Email Encryption encrypts email from end user to end user based on policy, protecting your confidential communications. Questions? View our Secure Messages Guide PDF File Download to find out what to do as a first-time user, along with how to open, respond to, and forward a secure email message.