Mahopac Bank, Sleepy Hollow Branch Basic Info Reviews Routing Numbers Map & Direction Name: Mahopac Bank, Sleepy Hollow Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 49 Beekman Avenue Sleepy Hollow, New York 10591 Westchester County View other branches Phone: 914-524-1950 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer021910836YN021911398YY From: To: