Demographic surveys -- Oregon -- Columbia County, Oregon -- Population -- Statistics
Columbia County asked Portland State University Population Research Center (PRC) to prepare integrated long term population forecasts (years 2010, 2020, and 2030) for the county and its six largest cities: Scappoose, St Helens, Clatskanie, Columbia City, Rainier, and Vernonia.
Portland State University. Population Research Center; Rynerson, Charles; and Radin, Kenneth, "Population Forecast for Columbia County Oregon, its Cities and Unincorporated Area 2010-2030" (2009). Oregon Population Estimates and Reports. 20.