| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Colonial Beach | 1 | 4,192 | 3,909 | 0.99% | 1,712 | 2 | Town |
| Montross | 2 | 356 | 333 | 0.85% | 345 | 1 | Town |
Colonial Beach is the largest city in Westmoreland County, with a population of 4,192.
Montross is the smallest city in Westmoreland County, with a population of 356.
There are 2 cities in Westmoreland County, Virginia.