Skip to main content.
We Put Our Members First.
Contact Us

Contact Us

Administrative Headquarters
5000 Louise Drive
PO Box 40
Mechanicsburg PA 17055
Monday - Friday: 9 am - 5 pm EST

Main Switchboard: (800) 283-2328 or (717) 697-1161

EZ Call: (800) 283-4372

Account Inquiries (TeleBranch/Customer Service): (800) 237-7288
Monday - Wednesday: 7:30 am to 5 pm EST
Thursday: 7:30 am to 6 pm EST
Friday: 7:30 am to 7 pm EST
Saturday: 8:30 am to 2 pm EST
Email: Account and Transaction Inquiries

Mailing Address for Loan Payments:
Members 1st FCU
P.O. Box 2104
Mechanicsburg, PA 17055-2104
Mailing Address for VISA Credit Card Payments:
Members 1st FCU
P.O. Box 2109
Mechanicsburg, PA 17055-1719
Mailing Address for Deposits:
Members 1st FCU
P.O. Box 2110
Mechanicsburg, PA 17055-1710


Members 1st FCU is committed to providing a website that is accessible to the widest possible audience in accordance with ADA standards and guidelines. We are actively working to increase accessibility and usability of our website to everyone. If you are using a screen reader or other auxiliary aid and are having problems using this website, please contact us at (800) 237-7288. All products and services available on this website are available at all Members 1st branch locations.