Sierra County's 2026 population is estimated at 2,979, reflecting a -2.2% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Sierra County is the 57th largest county in California. The 2010 population was 3,220 and has grown -7.48% since 2010.
Data after 2023 is projected based on recent change
Overall: 54.7 years
Female: 47.5 years
Male: 58.4 years
There are 2,349 adults, (963 of whom are seniors) in Sierra County.
Female: 1,467 (53.4%)
Male: 1,279 (46.6%)
The racial composition of Sierra County includes 86.42% White, 7.28% other race, and smaller percentages for Black or African American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 2,373 | 86.42% |
| Other race | 200 | 7.28% |
| Two or more races | 165 | 6.01% |
| Black or African American | 8 | 0.29% |
Sierra County 's average per capita income is $54,851. Household income levels show a median of $63,355. The poverty rate stands at 4.44%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $95,750 | - |
| Families | $95,339 | $113,861 |
| Households | $63,355 | $81,457 |
| Non Families | $42,849 | $44,319 |
Average Income
Median Household Income
Poverty Rate