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Oregon -- Population -- Statistics, Demographic surveys -- Oregon, Population forecasting -- Oregon -- Sherman County


Sherman County’s total population has declined since 2000, at an average annual rate of nearly one percent between 2000 and 2010 (Figure 1); however, Wasco UGB, one of its sub-areas, experienced population growth during the 2000s. Wasco, the most populous UGB, posted an average annual growth rate of a little less than one percent during the 2000 to 2010 period. This translated into a population increase of about 30 persons.

Sherman County’s population decline in the 2000s was the direct result of consistent net out-migration and periods of natural decreases (more deaths than births, Figure 12). The county’s aging population has contributed to an increase in deaths, which combined with a relatively steady number of births has resulted in a natural decrease for nine out of the 15 years between 2000 and 2015. While net out-migration and natural decrease were common during the last decade, in more recent years (2010 to 2015) net in-migration has occurred, bringing with it some population growth.

Total population in Sherman County is forecast to increase in the near-term (2016 to 2035), a trend that is driven by growth in the two sub-areas of Rufus and Wasco (Figure 1); however population decline is expected for the county over the remaining 31 years of the forecast period. This population decrease is the result of a growing natural decrease, which is expected to exceed net in-migration around 2030.

Sherman County’s total population is forecast to increase by about 50 persons over the next 19 years (2016-2035), but will likely see population decline of more than 80 persons during the last 31 years of the forecast period (2035-2066). Sub-areas are expected to generally follow their historical patterns of population increase or decrease over the forecast period.


This report is published by the Population Research Center at Portland State University, and is a product of the Oregon Population Forecast Program.

The introductory presentation, preliminary forecast presentation, and Sherman County final forecast tables are attached to this document as supplemental files.

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R2_Sherman_201509-10.pdf (1245 kB)
Introductory presentation

ShermanCountyPreliminaryPresentation_rev.pdf (622 kB)
Preliminary forecast presentation

Sherman_County_Final Forecast_Tables.ods (51 kB)
Final forecast tables