Washington Trust Bank Washington Trust Bank Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Services >> Banks Washington Trust Bank 901 W Bannock StBoise, ID 83702 | View on Google Maps Conrad Ball (208) 884-2740 | fax: (208) 333-9460 Visit Site Connect With Us A financial institution specializing in wealth management, business lending, and commercial and residential construction lending. Member Since: 2000 Send a message to: Washington Trust Bank Your Name: Your Email: Subject: Message: (Date: 8/11/2025)