| Place Name | Alleghany |
| Place Type | Census Designated Place |
| ZIP Code(s) | 95910 |
| County | Sierra County |
| Area Code(s) | 530 |
| Timezone | Pacific Standard Time (PST) |
| Population (2022) | 72 |
| Population Growth Rate (2010-19) | -48.28% |
| Majority Ethnicity | White 100% |
| US Congressional District(s) | California 1st |
| State Assembly Districts | 1 |
| State Senate Districts | 1 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |