County Maps US

Ventura County, California

A county in California, ranked 12 of 58 by population.

CountyFIPS 06111

Within California
Ventura County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data.

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Population
830,851
-12,942 (-1.5%) since 2020
Land area
1,841
square miles. A further 16.6% of the total area is water
Population density
451
people per square mile, computed rather than published
County seat
Ventura
Seat of county government.
Established
1873
152 years ago
Largest city
Oxnard city
Population 199,651.

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 Ventura 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 Ventura County, California 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 418 by 800 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 Ventura County ranks

Position among the 58 counties of California, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn CaliforniaNationally
Population830,85112th of 5877th of 3,144
Land area1,841 sq mi26th of 58318th of 3,144
Population density451 per sq mi14th of 58314th of 3,144
Median household income$109,79712th of 58104th of 3,143

Full data for Ventura County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population830,851Vintage 2025 Population Estimates
Population in 2020843,793Vintage 2025 Population Estimates
2020 estimates base?844,358Vintage 2025 Population Estimates
Land area1,841 sq mi2025 Gazetteer Files
Water area365.8 sq mi2025 Gazetteer Files
Total area2,207 sq mi2025 Gazetteer Files
Population density?451 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$109,797American Community Survey 2020-2024 5-Year Estimates
Median home value$822,700American Community Survey 2020-2024 5-Year Estimates
Median age39.6American Community Survey 2020-2024 5-Year Estimates
Households280,360American Community Survey 2020-2024 5-Year Estimates
Housing units295,878American 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
+1,786
8,348 births, 6,562 deaths
Net migration
-4,387
More people moved out than moved in.

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

The 3 areas bordering Ventura 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
Los Angeles CountyCalifornia71 mi9,694,934
Santa Barbara CountyCalifornia48 mi442,065
Kern CountyCalifornia39 mi927,068

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

Side by side

All 58 counties of California

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

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