17 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 20147 | Ashburn | 67,007 |
| 20148 | Ashburn | 63,615 |
| 20176 | Leesburg | 50,002 |
| 20164 | Sterling | 42,694 |
| 20152 | Chantilly | 36,453 |
| 20105 | Aldie | 35,539 |
| 20175 | Leesburg | 35,038 |
| 20165 | Sterling | 34,210 |
| 20132 | Purcellville | 19,241 |
| 20166 | Sterling | 13,854 |
| 20141 | Round Hill | 8,323 |
| 20180 | Lovettsville | 7,791 |
| 20158 | Hamilton | 5,137 |
| 20117 | Middleburg | 3,248 |
| 20197 | Waterford | 2,212 |
| 20184 | Upperville | 504 |
| 20129 | Paeonian Springs | 469 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 17 ZCTAs in Loudoun County, Virginia (US Census).