The Washington Trust Company, of Westerly, Providence Trust Office Basic Info Reviews Routing Numbers Map & Direction Name: The Washington Trust Company, of Westerly, Providence Trust Office Main Office: No Service: Limited Service Trust Office Location: 66 South Main Street Providence, Rhode Island 02903 Providence County View other branches Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer011500858YY011501750YN From: To: