| Place Name | Big Rock |
| Place Type | Census Designated Place |
| ZIP Code(s) | 24603 |
| County | Buchanan County |
| Area Code(s) | 276 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 266 |
| Majority Ethnicity | White 100% |
| US Congressional District(s) | Virginia 9th |
| House of Delegates Districts | 3 |
| State Senate Districts | 38 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 100% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |