| Locality | Post Code |
|---|---|
| Bristow, Prince William | 20136 |
| Catharpin, Prince William | 20143 |
| Dale City, Prince William | 22193 |
| Dumfries, Prince William | 22025, 22026 |
| Gainesville, Prince William | 20155 |
| Haymarket, Prince William | 20169 |
| Lake Ridge, Prince William | 22192 |
| Manassas, Prince William | 20109, 20111, 20112 |
| Montclair, Prince William | 22025 |
| Nokesville, Prince William | 20181 |
| Occoquan, Prince William | 22125 |
| Prince William, Prince William | 22192 |
| Quantico, Prince William | 22134, 22135 |
| Southbridge, Prince William | 22026 |
| Sudley Springs, Prince William | 20109 |
| Triangle, Prince William | 22172 |
| Woodbridge, Prince William | 22191, 22192, 22193 |