Document Type


Publication Date



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


Different growth patterns occur in different parts of the county, and the local trends within the UGBs and the area outside UGBs collectively influence population growth rates for the county as a whole.

Klamath 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); however, some of its sub-areas experienced more rapid population growth during the 2000s. Malin and the area outside UGBs posted the highest average annual growth rates at 2.4 and 0.7 percent, respectively, during the 2000 to 2010 period.

Klamath County’s positive population growth in the 2000s was due to the combination of net inmigration and natural increase (births minus deaths). At the same time an aging population not only led to an increase in deaths, but also resulted in a smaller proportion of women in their childbearing years and a consequent decline in births. The growing number of deaths and shrinking number of births led natural increase—the difference between births and deaths—to decline from 2000 to 2014. While net in-migration and natural increase both contributed to population growth from 2000 to 2010, in recent years (i.e., 2011-2014) these two numbers shrank—slowing population growth.

Total population in Klamath County as a whole as well as within its sub-areas will likely grow at a slightly faster pace in the first 20 years of the forecast period (2015 to 2035), and more slowly in the last 30 years (Figure 1). The tapering of growth rates is largely driven by an aging population—a demographic trend which is expected to lead to declining natural increase. As natural increase declines and becomes natural decrease, population growth is expected to become increasingly reliant on net in-migration.

Even so, Klamath County’s total population is forecast to increase by more than 5,100 over the next 20 years (2015-2035), but the county as whole is expected to see population decline over the last 30 years of the forecast period. With the exception of the area outside UGBs most sub-areas that saw population growth in the 2000s are forecast to have growth throughout the forecast period. Some sub-areas that experienced population loss in the 2000s are expected to show population increase throughout the forecast period, but these gains will likely be small.


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

Persistent Identifier

R1_GrantsPass_Klamath_intro-presentation.pdf (1241 kB)
Klamath County Introductory Presentation

R1_Medford_Klamath_forecast-presentation.pdf (635 kB)
Klamath County Preliminary Forecast Presentation

Klamath_Final_Forecasts_201506.ods (44 kB)
Klamath County Final Forecast Tables