Contact

Address: 1295 London Rd, Sarnia, ON N7S 1P6, Canada

Tel: +1 289-277-2443
Toll Free: 1.800.461.0888
Fax: 416.762.1803

At Mainstream Credit Union, we want to hear what you have to say. Email us by filling out our Contact Us Form.

Reminder: Do not send your personal or account information by email. If your request requires the disclosure of confidential account or personal information, please remember to always log on to your online banking account first to secure authenticity