Map for Washington County Chamber of Commerce Map for Washington County Chamber of Commerce Search | Advanced Search | New Members | Coupons and Discounts | All Categories Lodging, Travel & Tourism >> VISITORS INFORMATION Washington County Chamber of Commerce 5193 NE Elam Young Pkwy., Suite AHillsboro, OR 97124 | directions 5034734486 | fax: (503) 681-0535 Visit Site If your business isn't here, contact us today to get listed!