Other pages about the topic: Age data
Median Age, 2018
In 2010, the median age of persons living in Washington state was 37.3 years. In 2018 the median age had increased to 38.3 years.
Jefferson County had the highest median age in 2010 at 53.9 years. By 2018, the median age in Jefferson County had reached 58.4 years.
Washington state population by age group
Age, sex, race and Hispanic origin
- Intercensal and postcensal estimates
- Small Area Demographic Estimates (SADE)
- Projections, 2010-2040: State | State (ages 15-19 by single year)