to
Update
is an unincorporated community in Washington County, Oregon, United States. Founded in 1851, the community had the first school district in the county, and also contains the oldest cemetery in the state and the oldest Baptist church west of the Rocky Mountains. It is located north of Hillsboro near the intersection of West Union Road and Cornelius Pass Road north of the Sunset Highway. The name comes from a grove of five oak trees that was used as a meeting place of early settlers, or the "union of the west." West Union had a post office from 1874 to 1894.
As defined by the county, the community is located south of West Union Road and north of the Sunset Highway (U.S. Route 26). The eastern boundary is Cornelius Pass Road. West Union is situated on small hills and flat plains with Dawson Creek and Waible Gulch draining the area, both part of the drainage area of the Tualatin River.
The general community of West Union encompasses a larger area that includes areas to the north and east of the county-defined community area. Since 1983, portions of the community planning area have been annexed into the city of Hillsboro. The population in 1983 was 35 people.