Mahopac Bank, La Grange Branch Basic Info Reviews Routing Numbers Map & Direction Name: Mahopac Bank, La Grange Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 706 Freedom Plains Road Poughkeepsie, New York 12603 Dutchess County View other branches Phone: 845-454-1049 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer021910836YN021911398YY From: To: