Louisa County, Virginia
Quick answer: Louisa County is a county in Virginia with its seat at Louisa. Its estimated population in 2025 was 42,924, up 14.2% since 2020. It covers about 495 square miles of land.
| Type | county |
|---|---|
| County seat | Louisa |
| Established | 1742 |
| Population, 2025 estimate | 42,924 |
| Population, 2020 estimate | 37,785 |
| Change 2020–2025 | 13.6% |
| Rank by population in Virginia | 42 of 133 |
Overview
Louisa County is a county in the Commonwealth of Virginia, one of 95 in the state.[1] The county seat is Louisa.[2] The county was established in 1742.[2] The name comes from Louise of Great Britain.[2]
Population of Louisa County
The U.S. Census Bureau estimated the population of Louisa County at 42,924 in July 2025, up 14.2% from the April 2020 base of 37,586.[1] That made it 42nd of Virginia's 133 counties and independent cities by population. It ranked 3rd for growth since 2020.[1]
From 2020 to 2025 the Census Bureau counted about 2,238 births and 2,341 deaths, so deaths outnumbered births by 103.[1] More people moved in from other parts of the United States than moved away. Net domestic migration was 5,201. Moves from abroad added 257.[1]
Geography
Louisa County covers 495.0 square miles of land and 14.6 square miles of water.[3] By land area it ranks 25th of 133 in Virginia.[3] It had about 87 people per square mile in 2025, so it is mostly rural. Its geographic center lies near 37.97° N, 77.96° W.[3]
The county borders Albemarle County, Fluvanna County, Goochland County, Hanover County, Orange County and Spotsylvania County.[4]
The U.S. Geological Survey place-name database lists 75 named streams, 1 named summit, 31 lakes and reservoirs, 11 islands and 1 spring in the county.[5]
Towns
Louisa County has 2 incorporated towns. With their estimated 2025 populations, they are: Louisa (2,244), Mineral (532).[6] In Virginia, towns remain part of the county around them, unlike independent cities.
Frequently asked questions
What is the county seat of Louisa County?
Louisa.
What is the population of Louisa County?
About 42,924 people in 2025, according to the U.S. Census Bureau.
How big is Louisa County?
About 495 square miles of land, plus 14.6 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, Louisa 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.louisacounty.com
Boundary on the map: Census TIGERweb. See all counties and cities on the map.