About This Place
North Plains is a city in Washington County, Oregon, United States, off U.S. 26 on the northwest outskirts of the Portland metropolitan area. The population was 1,605 at the 2000 census; by July 2007 the population was estimated to be 1,813.
According to the United States Census Bureau, the city has a total area of 0.8 square miles (2.0 km²), all of it land.
What was to become the city of North Plains was first platted in September 1910 by the Ruth Trust Company of Portland, which purchased area tracts after James J. Hill made plans to extend United Railways there.