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Members 1st Federal Credit Union
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 (Customer Service)
Monday - Wednesday: 8 am - 5 pm
Thursday: 8 am - 5:30 pm
Friday: 7:30 am - 6 pm
Saturday: 8:30 am - 2 pm
Sunday: Closed
Phone: (800) 237-7288
In order to review and discuss specific details with your account, we ask that you contact us through a secure channel.

Current members, may do so by logging into Members 1st Online banking to send a Secure Message.

Not a member, you can apply to BECOME A MEMBER online now!

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


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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.