First Commonwealth Bank, Downtown Leechburg Office Basic Info Reviews Routing Numbers Map & Direction Name: First Commonwealth Bank, Downtown Leechburg Office Main Office: No Service: Full Service Brick and Mortar Office Location: 152 Market Street Leechburg, Pennsylvania 15656 Armstrong County View other branches Phone: 724-842-1181 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer043303887YN043306826YY044011453YN From: To: