Other pages about the topic: Forecasting & Research

Population by race

Washington state population by race


Population by age, mapped by county

Median Age, 2010

In 2010, the median age of persons living in Washington state was 37.3 years. In 2017 the median age had increased to 38.2 years.

Jefferson County had the highest median age in 2010 at 53.9 years. By 2017, the median age in Jefferson County had reached 57.9 years.

Hispanic population as a percent of total population


In 2017, the highest percentages of Hispanic residents were found in central Washington with Adams (56.8 percent), Franklin (54.9 percent) and Yakima (49.9 percent) counties posting the highest shares.

Components of population change


2000 Population 5,894,143
Plus Births + 842,082
Less Deaths - 463,516
Plus Net Migration + 451,831
2010 Population = 6,724,540

Single-parent families as a percent of all families with children (mapped by county)


Ferry County had the highest percentage of single parent families with 41.5 percent.

Garfield County had the lowest share of single parent families, with 17.3 percent.