Sunmark will never ask for your personal account information (including passwords) via email, text message, or phone call.
Learn more about protecting yourself from fraud.


System maintenance is scheduled for Saturday, December 16 between 10:00 p.m. - 2:00 a.m. During this time, Online and Mobile Banking, TAMI, and our myTMs will be unavailable. We apologize for any inconvenience.

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Columbia-Greene Members:
Welcome to Sunmark!

Your new Sunmark account is active as of February 1, 2021.

The Sunmark team is excited to welcome you to Sunmark! Our goal is to empower you to master your money and reach your financial aspirations. Now that your account has converted into Sunmark, you have access to added convenience, more financial services, and leading-edge technology.

Your Sunmark account is now active. Please note, your Columbia-Greene debit card and checks will no longer work. Please begin using your new Sunmark debit card and checks.

Account Conversion Guide

Please refer to the below Conversion Guides that were mailed to you at the beginning of January. Inside are important details regarding actions you may need to take. Need your new Sunmark account number? Call 866-SUNMARK. 

Consumer Account Conversion Guide

Business Account Conversion Guide

Sign up for Sunmark's Online Banking

Logging Into Sunmark's Online Banking 

Please refer to this quick video tutorial on how to log into Sunmark's Online Banking for the first time. 


Setting Up Transfers in Online Banking

Please refer to this informational video on how to set up one-time or scheduled recurring transfers within Sunmark's Online Banking.