4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Colonial Beach | 1 | 4,071 | 3,897 | 0.82% | 1,663 | 2 | Town |
| Colonial Beach | 2 | 4,071 | 3,904 | 0.82% | 1,663 | 2 | Town |
| Montross | 3 | 349 | 334 | 0.87% | 339 | 1 | Town |
| Montross | 4 | 349 | 334 | 0.87% | 339 | 1 | Town |
Colonial Beach is the largest city in Westmoreland County, with a population of 4,071.
Montross is the smallest city in Westmoreland County, with a population of 349.
There are 4 cities in Westmoreland County, Virginia.