Routing #275977489
Alert: Online, Mobile and Phone Banking Will be Unavailable overnight Saturday. Learn more

We look forward to hearing from you and will assist any way we can.
Please contact us through one of the options below:

Call: 800.923.7280 Info@MarineCU.com
Learn how our Digital Assistant Marci can assist you.

Please do not include confidential information in emails.
Marine Contact Center hours are Monday-Friday 7:00 am – 5:00 pm, Saturday 8:00 am – 1:00 pm
For a list our member’s Frequently Asked Questions, click here.
See local branch listings for locations, phone numbers and hours.
Let Us Know What You Think:
We value your thoughts and opinions and appreciate your feedback. If you received exceptional service from someone at Marine and would like to recognize them, or see some areas that could be improved, I would like to hear from you.
E-mail:
Mailing Address:
P.O. Box 309
Onalaska, WI 54650
Overnight
300 2nd St. N, Ste 400
La Crosse, WI 54601
Secured Party Lienholder Address:
P.O. Box 309
Onalaska, WI 54650
Bank by Phone:
Call 800.444.5717
Available 24 hours a day
Personal Identification Number (PIN) is required
Lost or Stolen MCU Credit or Debit Cards:
Debit card call 800.923.7280 during business hours
833.933.1681 after hours
Credit card call 800.558.3424
Debit Card Activation:
Debit card call 833.681.3437
Insurance Lienholder Address:
P.O. Box 3390
Carmel, IN 46082

Please do not include confidential information in submissions.

Marine Mobile App
View App