| Place Name | Round Hill |
| Place Type | Town |
| ZIP Code(s) | 20141 |
| County | Loudoun County |
| Area Code(s) | 540 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 525 |
| Population Growth Rate (2010-19) | 28.57% |
| Majority Ethnicity | White 90.4% |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Virginia 10th |
| House of Delegates Districts | 33 |
| State Senate Districts | 13 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 90.4% |
| African American | 1.81% |
| Hispanic | 0% |
| Asian | 0.28% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 7.51% |