
Downieville
- County:
- Sierra County
- County Seat:
- Yes
- Area (mi²):
- 3.181
- State:
- California
Downieville is a CDP located in Sierra County, California. Downieville has a 2025 population of 61. It is also the county seat of Sierra County. Downieville is currently declining at a rate of -19.74% annually and its population has decreased by -38.38% since the most recent census, which recorded a population of 99 in 2020.
The average household income in Downieville is $117,227 with a poverty rate of 0%. The median age in Downieville is 61.6 years: 68.1 years for males, and 61.5 years for females.