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


Wasco County’s total population has grown slowly since 2000, with average annual growth rates of less than one percent between 2000 and 2010 (Figure 1). The Dalles UGB and the area outside UGBs posted the highest average annual growth rates, both at about 0.6 percent during the 2000 to 2010 period.

Wasco County’s positive population growth in the 2000s was the result of a substantial net in-migration and periods of small natural increases and decreases (Figure 12). While net in-migration fluctuated dramatically during the early years of the last decade, the number of in-migrants has been more stable during second half of the decade and the recent years, contributing to a population increase.

Total population in Wasco County as a whole as well as within some of its sub-areas will likely grow at a slightly faster pace in the near-term (2016 to 2035) compared to the long-term (Figure 1). The tapering of growth rates is largely driven by an aging population—a demographic trend which is expected to contribute to a natural decrease (more deaths than births)—as well as a decline in net in-migration toward the end of the forecast.

Even so, Wasco County’s total population is forecast to increase by nearly 4,400 over the next 19 years (2016-2035) and by more than 10,500 over the entire 50-year forecast period (2016-2066). The Dalles, Mosier, and the area outside UGBs are expected to grow the most of all of Wasco County’s sub-areas.


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 Wasco County final forecast tables are attached to this document as supplemental files.

Persistent Identifier

R2_Wasco_201509-10.pdf (1241 kB)
Introductory presentation

WascoCountyPreliminaryPresentation_rev.pdf (690 kB)
Preliminary forecast presentation

Wasco _County_Final Forecast_Tables.ods (51 kB)
Final forecast tables