Northwest Bank, Clarion Main Street Basic Info Reviews Routing Numbers Map & Direction Name: Northwest Bank, Clarion Main Street Main Office: No Service: Full Service Brick and Mortar Office Location: 730 Main Street Clarion, Pennsylvania 16214 Clarion County View other branches Phone: 814-226-7873 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer041201114YN041202702YN243374218YY From: To: