wahkiakum county population
(Source: U.S. Census Bureau QuickFacts) Wahkiakumâs population is much older than the state and nation. In 2016: 18 percent of the county was below the age of 20, versus 25 percent statewide. 15 percent was aged 20 to 39, versus 27 percent statewide. 24 percent was aged 40 to 59, almost the same as the stateâs 26 percent.