Other pages about the topic: County data

Languages spoken at home (mapped by county)

Percent in households where English is spoken less than "very well"

Population Age 5 and Above, 2021

The smallest share of population where English was spoken less than "Very Well" was in Pend Oreille and Wahkiakum County at 0.2%. The highest share was in Adams County where 27.3% of persons were in this category.

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Educational attainment (mapped by county)

Percent high school graduates

Population Age 25 and Above, 2021

Jefferson (96.1%), San Juan (95.7%) and Island (95.5%) County had the highest percentages of high school graduates.

Adams (68.5%), Yakima (73.8%) and Franklin (75.9%) County had the lowest percentages of high school graduates.


Hispanic population as a percent of total population


In 2022, the highest percentages of Hispanic residents were found in central Washington with Adams (65.3%), Franklin (55.3%), and Yakima (52.3%) counties posting the highest shares.

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


Okanogan County had the highest percentage of single parent families with 45.5%.

Wahiakum County had the lowest share of single parent families, with 8.6%.

Data Sources:

E-mail: OFM.Forecasting@ofm.wa.gov

Poverty rate for single-parent families headed by a female householder (mapped by county)


Jefferson County had the highest percentage of single mother families in poverty at 63.7%.

The lowest poverty rates for families headed by single mothers was found in Columbia County at 17.8%.

Population by age, mapped by county

Median Age, 2022

In 2010, the median age of persons living in Washington state was 37.3 years. In 2022 the median age had increased to 38.6 years.

Jefferson County had the highest median age in 2010 at 53.9 years. By 2022, the median age in Jefferson County had reached 60.7 years.

Population by county — census data (map)

Population, 2010


Population, 2000

Population Change, 2000–2010

Average wages by county (map)

Average Wages, 1980

Inflation-Adjusted to 2022 Dollars