population for polk county oregon
Polk County, Oregon 2017 Population Estimate â 83,355 The Oregon Department of Administrative Services projects the Polk County 2015 population as 80,204 people and the 2020 population as 88,081. If we assume that the population changes linearly between 2015 and 2020, then the Polk County 2017 population would be 83,355. Note: this value is a projection, not a count. The 2010 Decennial Census provides the most recent count of the Polk County population as 75,403 people.