Washington County, Oregon CHAMBERS OF COMMERCE Washington County, Oregon CHAMBERS OF COMMERCE Search | Advanced Search | New Members | Coupons and Discounts | All Categories Sort alphabetically by... Name City Washington County Chamber of Commerce _ Learn More | Visit Site | Show on Map Hispanic Metropolitan Chamber _ 333 SW 5th Ave., #100Portland, OR 97204 (503) 222-0280 Learn More | Visit Site | Show on Map If your business isn't here, contact us today to get listed!