31 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dale City | 1 | 75,918 | 72,062 | 0.88% | 5,331 | 14 | CDP |
| Woodbridge | 2 | 52,260 | 42,517 | 6.55% | 5,793 | 9 | CDP |
| Lake Ridge | 3 | 45,635 | 45,111 | 0.67% | 5,005 | 9 | CDP |
| Linton Hall | 4 | 44,446 | 41,426 | 1.32% | 3,492 | 13 | CDP |
| Leesylvania | 5 | 27,642 | 21,880 | 7.14% | 5,997 | 5 | CDP |
| Cherry Hill | 6 | 24,131 | 20,344 | 2.3% | 3,093 | 8 | CDP |
| Montclair | 7 | 22,711 | 21,329 | 0.93% | 3,782 | 6 | CDP |
| Buckhall | 8 | 21,045 | 18,116 | 1.52% | 1,068 | 20 | CDP |
| Sudley | 9 | 20,061 | 18,019 | 1.3% | 7,279 | 3 | CDP |
| Gainesville | 10 | 18,345 | 16,391 | 2.56% | 1,814 | 10 | CDP |
| Bull Run | 11 | 17,029 | 16,769 | 0.81% | 6,527 | 3 | CDP |
| Manassas Park | 12 | 16,472 | 17,218 | -0.84% | 5,429 | 3 | City |
| Manassas Park | 13 | 16,472 | 17,164 | -0.84% | 5,429 | 3 | City |
| Triangle | 14 | 11,561 | 10,526 | 1.98% | 4,107 | 3 | CDP |
| Yorkshire | 15 | 11,319 | 9,118 | 2.28% | 4,813 | 2 | CDP |
| Independent Hill | 16 | 10,468 | 9,514 | 1.99% | 1,174 | 9 | CDP |
| Potomac Mills | 17 | 6,734 | 6,826 | 1.13% | 1,584 | 4 | CDP |
| Dumfries | 18 | 6,042 | 5,677 | 1.07% | 3,936 | 2 | Town |
| Dumfries | 19 | 6,042 | 5,719 | 1.07% | 3,936 | 2 | Town |
| Quantico Base | 20 | 5,602 | 5,283 | 1.39% | 801 | 7 | CDP |
| County Center | 21 | 4,212 | 4,104 | 1.49% | 2,086 | 2 | CDP |
| Loch Lomond | 22 | 3,888 | 4,325 | 0.31% | 5,408 | 1 | CDP |
| Camp Barrett | 23 | 1,882 | 1,564 | 7.11% | 274 | 7 | CDP |
| Innovation | 24 | 1,736 | 1,044 | 7.16% | 601 | 3 | CDP |
| Haymarket | 25 | 1,605 | 1,545 | 0.69% | 2,796 | 1 | Town |
| Haymarket | 26 | 1,605 | 1,547 | 0.69% | 2,796 | 1 | Town |
| Nokesville | 27 | 1,477 | 1,366 | 0.61% | 154 | 10 | CDP |
| Occoquan | 28 | 1,070 | 1,034 | 0.66% | 6,185 | 0 | Town |
| Occoquan | 29 | 1,070 | 1,035 | 0.66% | 6,185 | 0 | Town |
| Quantico | 30 | 594 | 578 | 0.51% | 8,486 | 0 | Town |
| Quantico | 31 | 594 | 579 | 0.51% | 8,486 | 0 | Town |
Dale City is the largest city in Prince William County, with a population of 75,918.
Quantico is the smallest city in Prince William County, with a population of 594.
There are 31 cities in Prince William County, Virginia.