After five years of stagnant growth, Oregon’s population is increasing again.  According to preliminary numbers from Portland State University's Population Research Center, the state added over 26,000 new residents.  Population Program Manager Risa Proehlsays only 44% of the growth was due to  natural increase. The number of births minus deaths.   Most of those who moved here settled in Multnomah, Clackamas, Marion, Deschutes and Lane counties.