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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).

Forecast Program Updates

  • The deadline for submitting Region 3 survey forms has been extended to February 15, 2017. You can find the forms here.
  • Presentations from the first round of Region 3 meetings are now available for download. Click here to go to the Region 3 documents page.
  • For information regarding data collection, and survey forms for Region 3, click here.

Background of the Oregon Population Forecast Program

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

  • For the PSU Standards and the former Oregon Administrative Rules (OARs) pertaining to the program, click here (.pdf file) and here.

  • For answers to frequently asked questions (FAQs), click 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:

    REGION 1: Coos, Crook, Curry, Deschutes, Douglas, Jackson, Jefferson, Josephine, Klamath, and Lane counties. July 2014-June 2015. 

    REGION 2: Baker, Gilliam, Grant, Harney, Hood River, Lake, Malheur, Morrow, Sherman, Umatilla, Union, Wallowa, Wasco, and Wheeler counties. July 2015-June 2016.

    REGION 3: Benton, Clackamas, Clatsop, Columbia, Linn, Lincoln, Marion, Multnomah, Polk, Tillamook, Washington, and Yamhill counties. July 2016-June 2017.

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