San Juan County's estimated 2026 population is 18,598 with a growth rate of 0.11% 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 17.84% since that time.
Data after 2023 is projected based on recent change
Overall: 57 years
Female: 58 years
Male: 56 years
There are 16,155 adults, (6,656 of whom are seniors) in San Juan County.
Female: 9,346 (50.6%)
Male: 9,132 (49.4%)
The racial composition of San Juan County includes 86.78% White, 3.98% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander, Black or African American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 16,035 | 86.78% |
| Two or more races | 1,257 | 6.8% |
| Other race | 735 | 3.98% |
| Asian | 248 | 1.34% |
| Native American | 111 | 0.6% |
| Native Hawaiian or Pacific Islander | 47 | 0.25% |
| Black or African American | 45 | 0.24% |
San Juan County's average per capita income is $48,343. Household income levels show a median of $84,800. The poverty rate stands at 11.34%.
Name | Median | Mean |
|---|---|---|
| Married Families | $116,394 | - |
| Families | $107,269 | $162,484 |
| Households | $84,800 | $131,031 |
| Non Families | $54,257 | $78,393 |
Average Income
Median Household Income
Poverty Rate