Jefferson County, Washington
Located in Washington, Jefferson County has a population of 33,577 residents and a median age of 59.8 years, making it the #1,382 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 11.1%. The median home value is $535,000, and the median household income is $74,048, which is 1% below the national median.
Demographics
Jefferson County has a population of 33,577, making it the #1,382 most populous county in the US. The median age is 59.8 years, which is 53.7% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Jefferson County is $74,048, ranking #905 out of 3,222 counties — 1.5% below the national median. The poverty rate is 11.1% and unemployment stands at 6.6%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Jefferson County is $535,000 (+89.8% vs national). Renters pay a median of $1,522/mo and the homeownership rate is 79.0%.
Median Home Value Trend
Rankings →Household Type
Education
In Jefferson County, 43.9% of adults age 25+ hold a bachelor's degree or higher, which is 30.3% above the national average, ranking #188 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Jefferson County is 80.1 years. 13.9% of adults report poor or fair health and 7.9% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
10.9% of adults in Jefferson County smoke , 26.1% are obese , and 21.9% report excessive drinking. The drug overdose death rate is 27.0 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 33.7 per 100,000. Motor vehicle deaths occur at a rate of 9.7 per 100,000.
Suicide Rate Trend
Families & Children
16.6% of children in Jefferson County live in poverty . The teen birth rate is 5.4 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Jefferson County is 90.5%. The mean commute time is 23.7 min, which is 14.3% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Jefferson County voted Democratic with a margin of 45.4%. The vote was 71.1% Dem / 25.7% Rep. Compared to 2020, the margin shifted +4.0 toward Democrats .
Vote Share Over Time
About Jefferson County, Washington
Jefferson County, Washington has a total population of 33,577, making it the 1,382nd most populous county in the United States. The median age in Jefferson County is 59.8 years, which is 53.7% above the national median of 38.9 years.
The median household income in Jefferson County is $74,048, which ranks #905 of 3,222 counties nationwide. This is 1.5% below the national median of $75,149. The poverty rate is 11.1%, lower than the national rate of 12.6%. The unemployment rate stands at 6.6%.
The median home value in Jefferson County is $535,000, 89.8% above the national median. Renters in Jefferson County pay a median gross rent of $1,522 per month. The homeownership rate is 79.0%, compared to the national rate of 64.4%.
In Jefferson County, 43.9% of residents aged 25 and older hold a bachelor's degree or higher, 30.3% above the national average of 33.7%. Health insurance coverage stands at 96.2% of the population. The average commute time for workers is 23.7 min.
Jefferson County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 84.6% of the population, followed by Two or More Races (6.5%) and Hispanic or Latino (4.4%).
All data for Jefferson County, Washington comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.