East Boston Savings Bank, Somerville Branch Basic Info Reviews Routing Numbers Map & Direction Name: East Boston Savings Bank, Somerville Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 37 Union Square Somerville, Massachusetts 02143 Middlesex County View other branches Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer211070023YN211070120YY211070243YN From: To: