| Zip Code | City | Population ↓ |
|---|---|---|
| 20187 | Warrenton | 18,980 |
| 20186 | Warrenton | 15,703 |
| 22712 | Bealeton | 9,501 |
| 20115 | Marshall | 8,173 |
| 22734 | Remington | 3,918 |
| 22728 | Midland | 3,752 |
| 20119 | Catlett | 3,416 |
| 20198 | The Plains | 2,251 |
| 20137 | Broad Run | 1,938 |
| 22742 | Sumerduck | 1,596 |
| 22720 | Goldvein | 1,497 |
| 20144 | Delaplane | 1,340 |
| 22639 | Hume | 606 |
| 22643 | Markham | 137 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 14 ZCTAs in Fauquier County, Virginia (US Census).