Other pages about the topic: Age data
Median Age, 2023
In 2010, the median age of persons living in Washington state was 37.3 years. In 2023 the median age had increased to 38.8 years.
Jefferson County had the highest median age in 2010 at 53.9 years. By 2023, the median age in Jefferson County had reached 64.1 years.
Washington state population by age group
Census 2020
The standards for data collection and reporting on race and ethnicity have changed
The Federal Office of Management and Budget has issued new standards for the reporting of federal race and ethnicity data through Statistical Policy Directive 15 (SPD15). See Race and Ethnicity Information page for more information.
- Projections, 2010-2040: State | State (ages 15-19 by single year)
