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.
Here for you 24/7.
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
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 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.
Diamond has several locations to serve our membership.
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.
All postal mail should be sent to:
Diamond Credit Union
1600 Medical Drive
Pottstown, PA 19464
If a specific person, department, or branch is desired, then please include that information as the first line of the address.
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.