Other pages about the topic: Age data

Population by age, mapped by county

Median Age, 2020

In 2010, the median age of persons living in Washington state was 37.3 years. In 2020 the median age had increased to 38.5 years.

Jefferson County had the highest median age in 2010 at 53.9 years. By 2020, the median age in Jefferson County had reached 59.5 years.

Estimates of April 1 population by age, sex, race and Hispanic origin

Preliminary county data

The Census Bureau has not released all of the data that OFM needs to fully update the Small Area Demographic Estimates (SADE) and related products. OFM used the 2020 Census data released so far to provide preliminary county-level data updates.