There are 40 cities in Loudoun County, Virginia.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Centreville | 1 | 72,938 | 74,230 | 0.18% | 6,110 | 11.9 | CDP |
| McLean | 2 | 49,832 | 48,566 | 0.24% | 2,010 | 24.8 | CDP |
| Leesburg | 3 | 49,622 | 48,382 | 0.63% | 3,943 | 12.6 | Town |
| Ashburn | 4 | 45,807 | 44,090 | 0.36% | 2,995 | 15.3 | CDP |
| South Riding | 5 | 34,875 | 32,526 | 2.23% | 5,095 | 6.8 | CDP |
| Sterling | 6 | 31,597 | 30,872 | 0.86% | 5,793 | 5.5 | CDP |
| Herndon | 7 | 25,052 | 24,583 | 0.47% | 5,845 | 4.3 | Town |
| Brambleton | 8 | 24,954 | 20,843 | 4.52% | 4,336 | 5.8 | CDP |
| Chantilly | 9 | 23,118 | 23,820 | 0.02% | 1,926 | 12.0 | CDP |
| Stone Ridge | 10 | 17,522 | 15,034 | 4.39% | 6,778 | 2.6 | CDP |
| Broadlands | 11 | 14,960 | 14,146 | 1.28% | 4,627 | 3.2 | CDP |
| Great Falls | 12 | 14,892 | 14,793 | -0.26% | 587 | 25.4 | CDP |
| Lansdowne | 13 | 13,104 | 12,679 | 1.02% | 3,241 | 4.0 | CDP |
| Sugarland Run | 14 | 12,988 | 12,656 | 0.66% | 6,465 | 2.0 | CDP |
| Cascades | 15 | 12,647 | 12,132 | 0.42% | 3,431 | 3.7 | CDP |
| Loudoun Valley Estates | 16 | 11,657 | 9,673 | 5.15% | 4,156 | 2.8 | CDP |
| Lowes Island | 17 | 11,350 | 11,319 | 0.38% | 3,762 | 3.0 | CDP |
| Belmont | 18 | 10,542 | 9,341 | 3.2% | 3,903 | 2.7 | CDP |
| Countryside | 19 | 9,575 | 9,517 | -0.36% | 3,730 | 2.6 | CDP |
| Fair Lakes | 20 | 9,081 | 8,398 | 0.91% | 3,835 | 2.4 | CDP |
| Purcellville | 21 | 8,917 | 8,943 | -0.08% | 2,634 | 3.4 | Town |
| Bull Run | 22 | 8,755 | 6,886 | 7.7% | 607 | 14.4 | CDP |
| Moorefield | 23 | 6,406 | 4,099 | 7.68% | 5,639 | 1.1 | CDP |
| Dulles Town Center | 24 | 6,098 | 5,362 | 1.79% | 2,539 | 2.4 | CDP |
| University Center | 25 | 4,329 | 3,878 | 1.24% | 4,716 | 0.9 | CDP |
| One Loudoun | 26 | 3,242 | 2,151 | 7.67% | 5,114 | 0.6 | CDP |
| Arcola | 27 | 2,804 | 1,761 | 6.98% | 1,227 | 2.3 | CDP |
| Goose Creek Village | 28 | 2,721 | 2,193 | 7.72% | 7,198 | 0.4 | CDP |
| Lovettsville | 29 | 2,706 | 2,708 | -0.04% | 3,034 | 0.9 | Town |
| Oak Grove | 30 | 2,659 | 2,863 | 2.43% | 2,275 | 1.2 | CDP |
| Round Hill | 31 | 684 | 695 | -0.44% | 1,864 | 0.4 | Town |
| Middleburg | 32 | 677 | 671 | 0.15% | 653 | 1.0 | Town |
| Shenandoah Retreat | 33 | 639 | 550 | 1.27% | 424 | 1.5 | CDP |
| Hamilton | 34 | 603 | 618 | -0.66% | 2,716 | 0.2 | Town |
| Kincora | 35 | 370 | 13 | 7.87% | 690 | 0.5 | CDP |
| Waterford | 36 | 289 | 256 | 7.43% | 798 | 0.4 | CDP |
| Aldie | 37 | 246 | 233 | 7.42% | 1,017 | 0.2 | CDP |
| Hillsboro | 38 | 110 | 116 | -1.79% | 415 | 0.3 | Town |
| Paris | 39 | 70 | 30 | 7.69% | 277 | 0.3 | CDP |
| Upperville | 40 | 64 | 129 | 6.67% | 150 | 0.4 | CDP |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Centreville is the largest city in Loudoun County.
Upperville is the smallest city in Loudoun County.
There are 40 cities in Loudoun County, Virginia.