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Oregon Population Forecast Program (OPFP)

Beginning in 1973 with the passage of Senate Bill (SB) 100, Oregon’s growth management system has relied on population forecasts as the primary tool for determining Urban Growth Boundary (UGB) expansions, as well as for crafting planning policy. By estimating future populations based on historic and current trends, as well as assuming the likelihood of future events, population forecasts provide necessary information to help planners, public officials, private firms, and developers better understand the short and long-term implications of population growth in local areas.  

In the recent past, Oregon law required that counties prepare coordinated population forecasts according to "generally accepted" demographic methods, which yielded forecasts produced with a highly diverse set of methods. Equally important, the prohibitive cost of forecasting meant that not all communities could update their forecasts on a regular basis.  Recognizing the need to be more responsive to accounting for current population trends by preparing population forecasts on a more regular basis, and with a consistent forecast methodology for communities across the state, the Oregon House of Representatives and Senate approved legislation in 2013 assigning coordinated population forecasting to the Population Research Center (PRC) at Portland State University (PSU).  

• To view or download a more detailed description of the program, click here.

• Read the Forecast Program FAQs here.

• If you have questions for any of the project's team members,contact Deborah Loftus at     503-725-5101 or e-mail us at

Oregon Administrative Rules pertaining to the Oregon Population Forecast Program

• Coordinated Forecast Groups by County:

Group #1: July 2014-June 2015 (Coos, Crook, Curry, Deschutes, Douglas, Jackson, Jefferson, Josephine, Klamath, Lane)
Group #2: July 2015-June 2016 (Baker, Gilliam, Grant, Harney, Hood River, Lake, Malheur, Morrow, Sherman, Umatilla, Union, Wallowa, Wasco, Wheeler)
Group #3:  July 2016-June 2017 (Benton, Clackamas, Clatsop, Columbia, Linn, Lincoln, Marion, Multnomah, Polk, Tillamook, Washington, Yamhill)

To view or download a larger version of this map, click here.