Westmoreland County, Virginia
County seat: Montross · Population 19,715 (2025) · 229 sq mi
Westmoreland County is the 81st most populous of Virginia's 133 counties, with 19,715 people (2025 estimate). Its county seat is Montross. It is part of the Northern Neck Planning District Commission (PD 17) region, one of the 21 Planning District Commissions of Virginia. The map shows its 2 cities and towns and the 6 neighboring counties.
Westmoreland County facts
- County seat
- Montross
- Population (2025 estimate)
- 19,715 +6.7% since 2020
- Land area
- 229 sq mi 82nd largest of 133
- Water area
- 24 sq mi
- Population density
- 86 per sq mi
- Established
- 1653
- Named after
- Westmorland historic county of England
- Largest city
- Colonial Beach 4,151
- Median household income
- $63,398
- Cities and towns
- 2
- ZIP codes
- 8
- Time zone
- Eastern
- FIPS code
- 51193
Cities and towns in Westmoreland County
Westmoreland County has 2 incorporated cities, towns and villages. Populations count the people living inside Westmoreland County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Colonial Beach | Town | 4,151 | |
| Montross (county seat) | Town | 353 |
ZIP codes in Westmoreland County
8 ZIP codes reach into Westmoreland County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 22435 also Northumberland and Richmond counties
- 22443 also King George County
- 22469
- 22485 also King George County
- 22488
- 22520 also Richmond County
- 22529
- 22572 also Richmond County
Population of Westmoreland County, 2020–2025
Westmoreland County grew by 1,235 people (+6.7%) between April 2020 and July 2025: 465 more deaths than births and a net gain of 1,716 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 18,513 |
| 2021 | 18,779 |
| 2022 | 18,712 |
| 2023 | 18,978 |
| 2024 | 19,338 |
| 2025 | 19,715 |
Neighboring counties
- Richmond County south · 9,294 people
- St. Mary's County, Maryland northeast · 116,692 people
- Essex County southwest · 10,654 people
- King George County northwest · 29,646 people
- Charles County, Maryland northwest · 176,593 people
- Northumberland County southeast · 12,557 people
Printable Westmoreland County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (116 KB)
- PNG (2400 px) (101 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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