Westmoreland County, Virginia

Quick answer: Westmoreland County is a county in Virginia with its seat at Montross. Its estimated population in 2025 was 19,715, up 6.7% since 2020. It covers about 229 square miles of land.

Overview

Westmoreland County is a county in the Commonwealth of Virginia, one of 95 in the state.[1] The county seat is Montross.[2] The county was established in 1653.[2] The name comes from Westmorland.[2]

Population of Westmoreland County

The U.S. Census Bureau estimated the population of Westmoreland County at 19,715 in July 2025, up 6.7% from the April 2020 base of 18,480.[1] That made it 81st of Virginia's 133 counties and independent cities by population. It ranked 24th for growth since 2020.[1]

From 2020 to 2025 the Census Bureau counted about 992 births and 1,457 deaths, so deaths outnumbered births by 465.[1] More people moved in from other parts of the United States than moved away. Net domestic migration was 1,713. Moves from abroad added 3.[1]

Geography

Westmoreland County covers 229.3 square miles of land and 23.6 square miles of water.[3] By land area it ranks 82nd of 133 in Virginia.[3] It had about 86 people per square mile in 2025, so it is mostly rural. Its geographic center lies near 38.11° N, 76.80° W.[3]

The county borders Essex County, King George County, Northumberland County and Richmond County in Virginia, as well as land in Maryland.[4]

The U.S. Geological Survey place-name database lists 94 named streams, 15 named summits, 28 lakes and reservoirs and 6 islands in the county.[5]

Towns

Westmoreland County has 2 incorporated towns. With their estimated 2025 populations, they are: Colonial Beach (4,151), Montross (353).[6] In Virginia, towns remain part of the county around them, unlike independent cities.

Frequently asked questions

What is the county seat of Westmoreland County?
Montross.

What is the population of Westmoreland County?
About 19,715 people in 2025, according to the U.S. Census Bureau.

How big is Westmoreland County?
About 229 square miles of land, plus 23.6 square miles of water.

References

• [1] U.S. Census Bureau, County Population Totals and Components of Change: 2020-2025 (Vintage 2025) – last checked 11/08/2026
• [2] Wikidata, Westmoreland County, Virginia (open data, CC0) – last checked 11/08/2026
• [3] U.S. Census Bureau, 2024 Gazetteer Files: Counties – last checked 11/08/2026
• [4] U.S. Census Bureau, County Adjacency File (2024) – last checked 11/08/2026
• [5] U.S. Geological Survey, Geographic Names Information System (GNIS), Domestic Names – last checked 11/08/2026
• [6] U.S. Census Bureau, City and Town Population Totals: 2020-2025 – last checked 11/08/2026

Official website: www.westmoreland-county.org

Boundary on the map: Census TIGERweb. See all counties and cities on the map.