| Place Name | Markham |
| Place Type | Unincorporated |
| ZIP Code(s) | 22643 |
| County | Fauquier County |
| Area Code(s) | 540,826 |
| Timezone | Eastern Standard Time (EST) |
| Population () | |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Virginia 10th |
| House of Delegates Districts | 30 |
| State Senate Districts | 31 |