Sonoma County's 2026 population is estimated at 489,393, reflecting a 0.41% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Sonoma County is the 17th largest county in California. The 2010 population was 484,675 and has grown 0.97% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.9 years
Female: 44.4 years
Male: 41.8 years
There are 392,643 adults, (104,389 of whom are seniors) in Sonoma County.
Female: 246,397 (50.8%)
Male: 238,643 (49.2%)
The racial composition of Sonoma County includes 61.82% White, 14.85% other race, 4.51% Asian, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 299,837 | 61.82% |
| Two or more races | 75,520 | 15.57% |
| Other race | 72,017 | 14.85% |
| Asian | 21,865 | 4.51% |
| Black or African American | 7,630 | 1.57% |
| Native American | 6,555 | 1.35% |
| Native Hawaiian or Pacific Islander | 1,616 | 0.33% |
Sonoma County 's average per capita income is $59,929. Household income levels show a median of $104,674. The poverty rate stands at 8.89%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $148,164 | $184,538 |
| Families | $126,900 | $163,665 |
| Households | $104,674 | $142,354 |
| Non Families | $66,590 | $98,376 |
Average Income
Median Household Income
Poverty Rate