Washington Trust Bank - Nampa Washington Trust Bank - Nampa Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Services >> Banks Washington Trust Bank - Nampa 2200 Cassia StNampa, ID 83651 | View on Google Maps (208) 442-5287 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 - Nampa Your Name: Your Email: Subject: Message: (Date: 8/10/2025)