Snohomish County's 2026 population is estimated at 891,745, reflecting a 1.57% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Snohomish County is the 3rd largest county in Washington. The 2010 population was 715,522 and has grown 24.63% since 2010.
Data after 2023 is projected based on recent change
Overall: 38.6 years
Female: 39.1 years
Male: 38 years
There are 657,574 adults, (124,763 of whom are seniors) in Snohomish County.
Female: 418,646 (49.6%)
Male: 425,784 (50.4%)
The racial composition of Snohomish County includes 64.18% White, 13.61% Asian, 5.2% other race, 3.69% Black or African American, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 541,948 | 64.18% |
| Asian | 114,960 | 13.61% |
| Two or more races | 98,994 | 11.72% |
| Other race | 43,909 | 5.2% |
| Black or African American | 31,141 | 3.69% |
| Native American | 8,838 | 1.05% |
| Native Hawaiian or Pacific Islander | 4,640 | 0.55% |
Snohomish County 's average per capita income is $68,158. Household income levels show a median of $111,246. The poverty rate stands at 8.04%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $150,930 | $183,003 |
| Families | $133,127 | $164,989 |
| Households | $111,246 | $142,821 |
| Non Families | $66,273 | $86,633 |
Average Income
Median Household Income
Poverty Rate