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Your Banking Needs All In One Place

Please feel free to use the form below to contact us. If you would like to reach one of our offices by phone, please call (800) 547-8531 or (989) 875-4144 during our normal business hours.


Our branches are located throughout Michigan. Stop in and see us in Alma, Grand Rapids, Greenville, Hastings, Ithaca, Mason, Middleton, Okemos, and St. Louis.

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Business Hours: Call (800) 547-8531  

After Hours: Call (800) 236-2442


(888) 570-9262

Commercial Bank Routing Number: 072403554

Mortgage Error Resolution – please send inquiries to Commercial Bank at 301 N. State St., Alma, MI 48801.

Commercial Bank building on the corner


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This communication should only be used for general inquiries. Commercial Bank suggests that confidential information, such as account number or social security numbers, never be transmitted via this communication.

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