Savings Institute Bank and Trust Company, Westerly Branch Basic Info Reviews Routing Numbers Map & Direction Name: Savings Institute Bank and Trust Company, Westerly Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 18 Post Road Westerly, Rhode Island 02891 Washington County View other branches Phone: 401-596-5353 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer011104283YN011501598YN211174181YY211174301YN211572615YN From: To: