The Washington Trust Company, of Westerly, Bonnet Shores Branch Basic Info Reviews Routing Numbers Map & Direction Name: The Washington Trust Company, of Westerly, Bonnet Shores Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 885 Boston Neck Road Narragansett, Rhode Island 02882 Washington County View other branches Phone: 401-782-4800 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer011500858YY011501750YN From: To: