
Alleghany
- County:
- Sierra County
- County Seat:
- No
- Area (mi²):
- 0.349
- State:
- California
Alleghany is a CDP located in Sierra County, California. Alleghany has a 2025 population of 79. Alleghany is currently growing at a rate of 6.76% annually but its population has decreased by -20.2% since the most recent census, which recorded a population of 99 in 2020.
The average household income in Alleghany is -$1000.00 Mn with a poverty rate of 0%. The median age in Alleghany is 0 years: 0 years for males, and 0 years for females.