15 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| New Baltimore | 1 | 12,649 | 11,017 | 2.45% | 1,053 | 12.01 | CDP |
| Warrenton | 2 | 10,319 | 10,046 | 0.54% | 2,356 | 4.38 | Town |
| Bealeton | 3 | 4,729 | 3,964 | 0.43% | 858 | 5.51 | CDP |
| Marshall | 4 | 3,421 | 2,913 | 3.92% | 1,186 | 2.88 | CDP |
| Southern Gateway | 5 | 2,488 | 3,291 | -0.84% | 774 | 3.21 | CDP |
| Apple Mountain Lake | 6 | 1,631 | 1,345 | 0.99% | 950 | 1.72 | CDP |
| Bull Run Mountain Estates | 7 | 1,593 | 1,777 | 1.4% | 905 | 1.76 | CDP |
| Skyland Estates | 8 | 781 | 941 | -0.38% | 326 | 2.39 | CDP |
| Remington | 9 | 658 | 627 | 0.92% | 3,005 | 0.22 | Town |
| The Plains | 10 | 255 | 247 | 0.79% | 924 | 0.28 | Town |
| Catlett | 11 | 163 | 54 | -5.23% | 51 | 3.22 | CDP |
| Midland | 12 | 154 | 94 | -2.53% | 38 | 4.04 | CDP |
| Rectortown | 13 | 74 | 59 | 7.25% | 116 | 0.64 | CDP |
| Upperville | 14 | 69 | 129 | 7.81% | 162 | 0.43 | CDP |
| Calverton | 15 | 8 | 72 | -65.22% | 2 | 4.59 | CDP |
New Baltimore is the largest city in Fauquier County, with a population of 12,649.
Calverton is the smallest city in Fauquier County.
There are 15 cities in Fauquier County, Virginia.