San Juan County's estimated 2025 population is 18,354 with a growth rate of -0.57% in the past year according to the most recent United States census data. San Juan County is the 32nd largest county in Washington. The 2010 population was 15,783 and has seen a growth of 16.29% since that time.
Data after 2023 is projected based on recent change
The racial composition of San Juan County includes 88.3% White, 3.16% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander, Black or African American and multiracial populations.
White
Two or more races
Other race
Asian
Native American
Native Hawaiian or Pacific Islander
Black or African American
Race | Population | Percentage (of total) |
|---|---|---|
| White | 16,129 | 88.3% |
| Two or more races | 1,158 | 6.34% |
| Other race | 577 | 3.16% |
| Asian | 209 | 1.14% |
| Native American | 95 | 0.52% |
| Native Hawaiian or Pacific Islander | 50 | 0.27% |
| Black or African American | 48 | 0.26% |
Married
Widowed
Divorced
Separated
Never Married
San Juan County's average per capita income is $45,286. Household income levels show a median of $83,682. The poverty rate stands at 10.48%.
Name | Median | Mean |
|---|---|---|
| Married Families | $117,759 | - |
| Families | $104,737 | $160,170 |
| Households | $83,682 | $129,398 |
| Non Families | $52,480 | $77,214 |
Average Income
Median Household Income
Poverty Rate