County Maps US

Louisa County, Virginia

A county in Virginia, ranked 42 of 133 by population.

CountyFIPS 51109

Within Virginia
Louisa County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Louisa, the county seat, located via the 2025 Census Gazetteer.

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Population
42,924
+5,139 (+13.6%) since 2020
Land area
495.1
square miles. A further 2.9% of the total area is water
Population density
86.7
people per square mile, computed rather than published
County seat
Louisa
Seat of county government.
Established
1742
283 years ago
Largest city
Louisa town
Population 2,244.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Louisa County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Louisa County, Virginia from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 704 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Louisa County ranks

Position among the 133 counties and independent cities of Virginia, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn VirginiaNationally
Population42,92442nd of 1331,137th of 3,144
Land area495.1 sq mi25th of 1332,102nd of 3,144
Population density86.7 per sq mi76th of 1331,021st of 3,144
Median household income$86,68935th of 133383rd of 3,143

Full data for Louisa County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population42,924Vintage 2025 Population Estimates
Population in 202037,785Vintage 2025 Population Estimates
2020 estimates base?37,586Vintage 2025 Population Estimates
Land area495.1 sq mi2025 Gazetteer Files
Water area14.6 sq mi2025 Gazetteer Files
Total area509.7 sq mi2025 Gazetteer Files
Population density?86.7 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$86,689American Community Survey 2020-2024 5-Year Estimates
Median home value$315,300American Community Survey 2020-2024 5-Year Estimates
Median age44.8American Community Survey 2020-2024 5-Year Estimates
Households15,561American Community Survey 2020-2024 5-Year Estimates
Housing units18,366American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
+2
422 births, 420 deaths
Net migration
+753
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 6 areas bordering Louisa County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Goochland CountyVirginia27 mi29,187
Spotsylvania CountyVirginia26 mi155,388
Hanover CountyVirginia21 mi116,423
Orange CountyVirginia20 mi40,083
Fluvanna CountyVirginia15 mi28,975
Albemarle CountyVirginia10 mi118,356

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 133 counties and independent cities of Virginia

Open the interactive Virginia county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.