Northwest Bank, St Marys Plaza Basic Info Reviews Routing Numbers Map & Direction Name: Northwest Bank, St Marys Plaza Main Office: No Service: Full Service Brick and Mortar Office Location: 824 South St Marys Street Saint Marys, Pennsylvania 15857 Elk County View other branches Phone: 814-781-3277 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer041201114YN041202702YN243374218YY From: To: