Oregon -- Population -- Statistics, Demographic surveys -- Oregon
Estimates of Population Age Groups (ages under 18 yrs., 18-64 yrs., and 65 yrs. and over) for Oregon and Its Counties, July 1, 2016.
Portland State University. Population Research Center and Proehl, Risa, "Estimates of Broad Age Groups by County 2016" (2016). Oregon Population Estimates and Reports. 53.