Roy is an unincorporated historical community in Washington County, Oregon, United States. It is located south of the Sunset Highway (U.S. 26) and southeast of the city of Banks. Circa 1905, representatives of the Pacific Railway and Navigation Company, interested in putting a rail line through from Hillsboro to Tillamook on the coast, began approaching farmers living northeast of Greenville. With the railroad coming through the Tualatin Valley a mile north of the Vandervelden farm, William Vandervelden and his sons, J.W. and Frank, decided to buy land around the intended railway went through Lewis Roy's place, thus the road crossing was called Roy. The railroad went through that region in 1907, and a new church was built north of the tracks in 1908. Roy post office was established in 1907