Northwest Bank, Bethel Park Basic Info Reviews Routing Numbers Map & Direction Name: Northwest Bank, Bethel Park Main Office: No Service: Full Service Brick and Mortar Office Location: 6284 Library Road Bethel Park, Pennsylvania 15102 Allegheny County View other branches Phone: 412-831-8440 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer041201114YN041202702YN243374218YY From: To: