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Portland State University

Population forecasting -- Oregon -- Washington County

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Coordinated Population Forecast For Washington County, Its Urban Growth Boundaries (Ugb), And Area Outside Ugbs 2020-2070, Portland State University. Population Research Center, Nicholas Chun, Kevin Rancik, Paul Runge, Mac Cunningham, Charles Rynerson Jun 2020

Coordinated Population Forecast For Washington County, Its Urban Growth Boundaries (Ugb), And Area Outside Ugbs 2020-2070, Portland State University. Population Research Center, Nicholas Chun, Kevin Rancik, Paul Runge, Mac Cunningham, Charles Rynerson

Oregon Population Forecast Program

Different areas within Oregon counties experience different growth patterns. Those patterns combine to collectively determine county‐level demographic changes. Washington County is comprised of three types of areas: areas within Metro’s jurisdiction, urban‐growth boundary (UGB) areas outside of Metro’s jurisdiction (Banks, Gaston, and North Plains), and areas outside of Metro and those UGBs. In this report, we focus on Washington County as a whole as well as non‐Metro sub‐areas.

Washington County’s total population has grown swiftly over the last half century, only slowing modestly during Oregon’s deep 1980s recession. Since 1990, average annual growth rates have slowed from above 3 percent …


Coordinated Population Forecast For Washington County, Its Urban Growth Boundaries (Ugb), And Area Outside Ugbs 2017-2067, Portland State University. Population Research Center, Jason R. Jurjevich, Nicholas Chun, Kevin Rancik, Risa Proehl, Julia Michel, Matt Harada, Charles Rynerson, Randy Morris Jun 2017

Coordinated Population Forecast For Washington County, Its Urban Growth Boundaries (Ugb), And Area Outside Ugbs 2017-2067, Portland State University. Population Research Center, Jason R. Jurjevich, Nicholas Chun, Kevin Rancik, Risa Proehl, Julia Michel, Matt Harada, Charles Rynerson, Randy Morris

Oregon Population Forecast Program

Different parts of the county experience differing growth patterns. Local trends within the UGBs and the area outside them collectively influence population growth rates for the county as a whole.

Washington County’s total population has grown strongly during the 2000s, with an average annual growth rate of 1.8 percent between 2000 and 2010. However, some of its sub-areas experienced more rapid population growth during the 2000s. North Plains, the most populous UGB in Washington County outside of the Metro boundary, and Banks, posted the highest average annual growth rates at 2.0 and 3.0 percent, respectively, during the 2000 to 2010 …