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Ready to connect? Whether you have questions, need guidance, or want to explore solutions, our dedicated team is here for you. Let’s unlock your financial potential together. Reach out today, and experience the Marathon Bank difference.

Contact Us

For your protection, please do not include any confidential information on this form, such as account numbers(s) or Social Security number.


Customer Care Center

(715) 845-7331Toll-free (844) 864-73308:00AM – 5:00PM (MON-FRI)9:00AM – 12:00PM (SAT)

Phone Banking


Lost/Stolen Cards:

MasterCard® Debit Card – During Business Hours(844) 864-7330Mastercard Debit Card – After Hours(800) 472-3272 Personal or Business Credit Cards(800)367-7576

Bill Pay Support

Toll-free (844) 864-7330

Leaving Wisconsin?

Use of your debit card outside of Wisconsin is limited to protect you from debit card fraud. If you plan to use your card outside of Wisconsin, contact us toll-free at (844) 864-7330 or add your travel plans to your card using the Marathon Bank Mobile Banking App.