| Place Name | Opal |
| Place Type | Census Designated Place |
| ZIP Code(s) | 20186 20187 22712 |
| County | Fauquier County |
| Area Code(s) | 540 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 661 |
| Population Growth Rate (2010-19) | -1.88% |
| Majority Ethnicity | White 74.22% |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Virginia 5th |
| House of Delegates Districts | 18,88 |
| State Senate Districts | 27 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 74.22% |
| African American | 14.29% |
| Hispanic | 0% |
| Asian | 4.01% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 7.49% |