26 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dale City | 1 | 75,918 | 72,062 | 0.88% | 5,331 | 14.24 | CDP |
| Woodbridge | 2 | 52,260 | 42,517 | 6.55% | 5,793 | 9.02 | CDP |
| Lake Ridge | 3 | 45,635 | 45,111 | 0.67% | 5,005 | 9.12 | CDP |
| Linton Hall | 4 | 44,446 | 41,426 | 1.32% | 3,492 | 12.73 | CDP |
| Leesylvania | 5 | 27,642 | 21,880 | 7.14% | 5,997 | 4.61 | CDP |
| Cherry Hill | 6 | 24,131 | 20,344 | 2.3% | 3,093 | 7.80 | CDP |
| Montclair | 7 | 22,711 | 21,329 | 0.93% | 3,782 | 6 | CDP |
| Buckhall | 8 | 21,045 | 18,116 | 1.52% | 1,068 | 19.70 | CDP |
| Sudley | 9 | 20,061 | 18,019 | 1.3% | 7,279 | 2.76 | CDP |
| Gainesville | 10 | 18,345 | 16,391 | 2.56% | 1,814 | 10.11 | CDP |
| Bull Run | 11 | 17,029 | 16,769 | 0.81% | 6,527 | 2.61 | CDP |
| Manassas Park | 12 | 15,827 | 17,162 | -1.66% | 5,217 | 3.03 | City |
| Triangle | 13 | 11,561 | 10,526 | 1.98% | 4,107 | 2.81 | CDP |
| Yorkshire | 14 | 11,319 | 9,118 | 2.28% | 4,813 | 2.35 | CDP |
| Independent Hill | 15 | 10,468 | 9,514 | 1.99% | 1,174 | 8.92 | CDP |
| Potomac Mills | 16 | 6,734 | 6,826 | 1.13% | 1,584 | 4.25 | CDP |
| Dumfries | 17 | 6,049 | 5,716 | 1.12% | 3,941 | 1.53 | Town |
| Quantico Base | 18 | 5,602 | 5,283 | 1.39% | 801 | 6.99 | CDP |
| County Center | 19 | 4,212 | 4,104 | 1.49% | 2,086 | 2.02 | CDP |
| Loch Lomond | 20 | 3,888 | 4,325 | 0.31% | 5,408 | 0.72 | CDP |
| Camp Barrett | 21 | 1,882 | 1,564 | 7.11% | 274 | 6.86 | CDP |
| Innovation | 22 | 1,736 | 1,044 | 7.16% | 601 | 2.89 | CDP |
| Haymarket | 23 | 1,585 | 1,547 | 0.51% | 2,761 | 0.57 | Town |
| Nokesville | 24 | 1,477 | 1,366 | 0.61% | 154 | 9.57 | CDP |
| Occoquan | 25 | 1,055 | 1,034 | 0.38% | 6,098 | 0.17 | Town |
| Quantico | 26 | 584 | 578 | 0.17% | 8,343 | 0.07 | 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.
There are 26 cities in Prince William County, Virginia.