San Juan County, Washington
Located in Washington, San Juan County has a population of 18,478 residents and a median age of 57.0 years, making it the #1,962 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 11.3%. The median home value is $799,200, and the median household income is $84,800, which is 13% above the national median.
Demographics
San Juan County has a population of 18,478, making it the #1,962 most populous county in the US. The median age is 57.0 years, which is 46.5% 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 San Juan County is $84,800, ranking #429 out of 3,222 counties — 12.8% above the national median. The poverty rate is 11.3% and unemployment stands at 3.7%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in San Juan County is $799,200 (+183.5% vs national). Renters pay a median of $1,512/mo and the homeownership rate is 78.0%.
Median Home Value Trend
Rankings →Household Type
Education
In San Juan County, 53.9% of adults age 25+ hold a bachelor's degree or higher, which is 60.0% above the national average, ranking #62 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in San Juan County is 87.4 years. 13.5% of adults report poor or fair health and 9.9% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
10.7% of adults in San Juan County smoke , 25.9% are obese , and 22.4% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 17.2 per 100,000. Motor vehicle deaths occur at a rate of 8.5 per 100,000.
Suicide Rate Trend
Families & Children
13.5% of children in San Juan County live in poverty . The teen birth rate is 5.9 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in San Juan County is 93.8%. The mean commute time is 17.3 min, which is 37.3% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, San Juan County voted Democratic with a margin of 51.4%. The vote was 73.7% Dem / 22.3% Rep. Compared to 2020, the margin shifted +0.9 toward Democrats .
Vote Share Over Time
About San Juan County, Washington
San Juan County, Washington has a total population of 18,478, making it the 1,962nd most populous county in the United States. The median age in San Juan County is 57.0 years, which is 46.5% above the national median of 38.9 years.
The median household income in San Juan County is $84,800, which ranks #429 of 3,222 counties nationwide. This is 12.8% above the national median of $75,149. The poverty rate is 11.3%, lower than the national rate of 12.6%. The unemployment rate stands at 3.7%.
The median home value in San Juan County is $799,200, 183.5% above the national median. Renters in San Juan County pay a median gross rent of $1,512 per month. The homeownership rate is 78.0%, compared to the national rate of 64.4%.
In San Juan County, 53.9% of residents aged 25 and older hold a bachelor's degree or higher, 60.0% above the national average of 33.7%. Health insurance coverage stands at 94.0% of the population. The average commute time for workers is 17.3 min.
San Juan County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 85.2% of the population, followed by Hispanic or Latino (7.6%) and Two or More Races (4.6%).
All data for San Juan 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.