Skip to main content

San Juan County, Washington Demographics 2026

San Juan County, Washington has a population of 18,266, the 32nd most populous county in Washington. The median household income is $83,682 and the median home value is $726,500. The poverty rate is 10.5%.

San Juan County Quick Facts

Population 18,266
Median Household Income $83,682
Median Home Value $726,500
Poverty Rate 10.5%
Unemployment Rate 3.0%
Median Age 56.7 years
Homeownership Rate 77.8%
Affordability Ratio 8.7x
Bachelor's Degree+ 53.4%
High School Graduation 95.5%
Cities/Places 0
Population 18,266 32nd of 39
Median Income $83,682 12% lower state
Poverty Rate 10.5%
Unemployment 3.0%

Economy & Housing

Employment

3.0% Unemployment Rate State: 5.0% | National: 5.2%
53.4% Labor Force Participation

Housing Overview

Owner 77.8%
Renter 22.2%
Affordability Index Very Expensive
8.7x home value to income ratio

People & Demographics

Diversity Index

25out of 100
Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 55 | National average: 60

Education

Explore Washington Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

San Juan County is located in Washington with a total population of 18,266. It is the 32nd most populous county out of 39 in Washington.

Age Demographics

The median age in San Juan County is 56.7 years. This is 48% higher than the state median of 38.2 years. Only 12.8% of residents are under 18, indicating fewer families with children. 13.4% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in San Juan County is $83,682. This is 12% lower than the state median of $94,952. Compared to the national median of $78,538, household income here is 7% higher. The poverty rate stands at 10.5%. This is 6% higher than the state poverty rate of 9.9%. The unemployment rate is 3.0%. This is 39% lower than the state rate of 5.0%. The median home value is $726,500. Housing costs are 40% higher than the state median of $519,800. The home-value-to-income ratio of 8.7x suggests that housing affordability is a significant concern for many residents. 77.8% of occupied housing units are owner-occupied. This homeownership rate is 22% higher than the state average of 63.9%.

Race & Ethnicity

San Juan County has a predominantly White (non-Hispanic) population, comprising 86.1% of all residents. Hispanic or Latino residents account for 7.5%. The Black or African American population (0.3%) is well below the state average of 3.8%. The Asian population (1.1%) is well below the state average of 9.3%.

Education

53.4% of residents aged 25 and older hold a bachelor's degree or higher. This places San Juan County in the top 10% of all cities in the state for educational attainment. This is 38% higher than the state rate of 38.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.5%. Notably, 22.8% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Frequently Asked Questions

What is the population of San Juan County, Washington?

San Juan County has a population of 18,266, making it the 32nd most populous county in Washington.

What is the median income in San Juan County?

The median household income in San Juan County is $83,682 with a poverty rate of 10.5%.

How many cities are in San Juan County, Washington?

San Juan County contains 0 Census-designated places.