Northern State Bank, Mellen Branch Basic Info Reviews Routing Numbers Map & Direction Name: Northern State Bank, Mellen Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 103 North Main Mellen, Wisconsin 54546 Ashland County View other branches Phone: 715-274-2421 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer091206402YN091510253YN From: To: