Grand Bank, Hamilton Square Office Branch Basic Info Reviews Routing Numbers Map & Direction Name: Grand Bank, Hamilton Square Office Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 2265 Route 33 Hamilton, New Jersey 08690 Mercer County View other branches Phone: 609-514-3900 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer021213313YN031207885YY From: To: