Mariposa County's 2026 population is estimated at 17,152, reflecting a 0.3% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Mariposa County is the 53rd largest county in California. The 2010 population was 18,302 and has grown -6.28% since 2010.
Data after 2023 is projected based on recent change
Overall: 51.2 years
Female: 53.3 years
Male: 49.2 years
There are 14,141 adults, (5,073 of whom are seniors) in Mariposa County.
Female: 8,393 (49.1%)
Male: 8,689 (50.9%)
The racial composition of Mariposa County includes 77.21% White, 5.71% other race, and smaller percentages for Asian, Native American, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 13,189 | 77.21% |
| Two or more races | 2,095 | 12.26% |
| Other race | 976 | 5.71% |
| Asian | 326 | 1.91% |
| Native American | 285 | 1.67% |
| Black or African American | 182 | 1.07% |
| Native Hawaiian or Pacific Islander | 29 | 0.17% |
Mariposa County 's average per capita income is $52,087. Household income levels show a median of $68,412. The poverty rate stands at 14.04%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $111,753 | - |
| Families | $90,634 | $109,611 |
| Households | $68,412 | $89,438 |
| Non Families | $40,235 | $53,340 |
Average Income
Median Household Income
Poverty Rate