Founded in 1731, Prince William County is one of 95 counties in the state of Virginia. Historically, Prince William County was formed from Stafford and King George counties. The city of Manassas is the county seat. With FIPS code of 153, Prince William County has a population of 484,472 and area of 338 square miles (875 km2).
List of all cities in Prince William County, VA alphabetically
| City/Town | Postal Code | Area Code |
| Bristow, VA | 20136 | 703/571 |
| Catharpin, VA | 20143 | 703/571 |
| Dale City, VA | 22193 | 703/571 |
| Dumfries, VA | 22025 | 703/571 |
| 22026 | 703/571 | |
| Gainesville, VA | 20155 | 703/571 |
| 20156 | 703/571 | |
| Haymarket, VA | 20168 | 703/571 |
| 20169 | 703/571 | |
| Lake Ridge, VA | 22192 | 703/571 |
| Manassas, VA | 20109 | 703/571 |
| 20111 | 703/571 | |
| 20112 | 703/571 | |
| Manassas Park, VA | 20111 | 703/571 |
| MCB Quantico, VA | 22134 | 703/571 |
| Montclair, VA | 22025 | 703/571 |
| Nokesville, VA | 20181 | 703/571 |
| 20182 | 703/571 | |
| Occoquan, VA | 22125 | 703/571 |
| Prince William, VA | 22192 | 703/571 |
| Quantico, VA | 22134 | 703/571 |
| Quantico Naval Hospital, VA | 22134 | 703/571 |
| Southbridge, VA | 22026 | 703/571 |
| Sudley Springs, VA | 20109 | 703/571 |
| Triangle, VA | 22172 | 703/571 |
| Woodbridge, VA | 22191 | 703/571 |
| 22192 | 703/571 | |
| 22193 | 703/571 | |
| 22194 | 703/571 | |
| 22195 | 703/571 |