Lassen County's 2026 population is estimated at 27,344, reflecting a -1.79% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Lassen County is the 49th largest county in California. The 2010 population was 34,828 and has grown -21.49% since 2010.
Data after 2023 is projected based on recent change
Overall: 38.3 years
Female: 42.8 years
Male: 36.9 years
There are 24,745 adults, (5,012 of whom are seniors) in Lassen County.
Female: 11,594 (38.2%)
Male: 18,762 (61.8%)
The racial composition of Lassen County includes 67.2% White, 6.2% Black or African American, 3.92% other race, 3.44% Native American, and smaller percentages for Asian, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 20,400 | 67.2% |
| Two or more races | 4,898 | 16.14% |
| Black or African American | 1,883 | 6.2% |
| Other race | 1,189 | 3.92% |
| Native American | 1,045 | 3.44% |
| Asian | 652 | 2.15% |
| Native Hawaiian or Pacific Islander | 289 | 0.95% |
Lassen County 's average per capita income is $48,117. Household income levels show a median of $67,403. The poverty rate stands at 13.96%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $93,272 | - |
| Families | $81,765 | $94,412 |
| Households | $67,403 | $81,033 |
| Non Families | $38,639 | $54,472 |
Average Income
Median Household Income
Poverty Rate