San Juan County's estimated 2026 population is 18,794 with a growth rate of 0.34% 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 19.08% 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 (88.3%)
Two or more races (6.34%)
Other race (3.16%)
Asian (1.14%)
Native American (0.52%)
Native Hawaiian or Pacific Islander (0.27%)
Black or African American (0.26%)
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