Contact Us

If you need to speak directly with a Diamond Representative, we offer several methods to do so, including online and phone options. We look forward to assisting you 24 hours a day, seven days a week.

Diamond Credit Union Routing Number: 231385154

For general questions, you can chat online with a Diamond Member Services Representative during regular business hours. When you chat, you will be communicating live with Diamond.

call center24-HOUR CALL CENTER
610-326-5490 / 800-593-1000

During Normal Business Hours: Choose from a list of automated options or connect with our Call Center for personal assistance.
Monday – Wednesday: 9:00 a.m. to 4:30 p.m. (Eastern Time)
Thursday & Friday: 9:00 a.m. to 7:00 p.m.
Saturday: 9:00 a.m. to 1:00 p.m.

After Hours Assistance: Diamond now offers after-hours support. A live person is available to answer questions and assist members, or in certain cases, a Diamond representative will follow-up the next business day. For assistance, call 800-593-1000, option #3.


Using a touch-tone phone, follow the prompts to get your account balances, transfer funds, and much more.
Telebranch: 610-326-5490, option #2

IN PERSON – Branch Locations

Diamond currently has several locations to serve our membership. Click here for hours and locations.


Use our convenient email form below to submit your email address and your question/request. A Diamond Representative will respond by the end of the next business day. Please DO NOT include account numbers or sensitive information in this email.

Contact Us

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FRIENDLY REMINDER: It is extremely important that you provide Diamond with your updated contact information, including cell number and email address so that we can reach you regarding suspicious debit card or credit card activity. Contact us to update your email, phone and/or address, or update your info through NetBranch Online Banking


To help ensure the security of your account(s) at Diamond, an expanded fraud detection and prevention service has been added on Diamond Visa Debit Cards at no cost to members. The monitoring service will attempt to contact you by your phone numbers on file.

Lost or Stolen Card?

For assistance with lost or stolen cards, visit the Card Emergencies section of our website.