County Maps US

Orange County, California

A county in California, ranked 3 of 58 by population.

CountyFIPS 06059

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

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Population
3,149,507
-36,660 (-1.2%) since 2020
Land area
793.2
square miles. A further 16.5% of the total area is water
Population density
3,970
people per square mile, computed rather than published
County seat
Santa Ana
Seat of county government.
Established
Not available
Largest city
Anaheim city
Population 341,008.

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 Orange 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 Orange 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 800 by 770 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 Orange 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
Population3,149,5073rd of 586th of 3,144
Land area793.2 sq mi47th of 581,081st of 3,144
Population density3,970 per sq mi2nd of 5827th of 3,144
Median household income$116,2897th of 5865th of 3,143

Full data for Orange County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population3,149,507Vintage 2025 Population Estimates
Population in 20203,186,167Vintage 2025 Population Estimates
2020 estimates base?3,187,279Vintage 2025 Population Estimates
Land area793.2 sq mi2025 Gazetteer Files
Water area156.5 sq mi2025 Gazetteer Files
Total area949.7 sq mi2025 Gazetteer Files
Population density?3,970 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$116,289American Community Survey 2020-2024 5-Year Estimates
Median home value$962,600American Community Survey 2020-2024 5-Year Estimates
Median age39.4American Community Survey 2020-2024 5-Year Estimates
Households1,082,960American Community Survey 2020-2024 5-Year Estimates
Housing units1,146,169American 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
+7,721
29,899 births, 22,178 deaths
Net migration
-16,196
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 4 areas bordering Orange 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
Riverside CountyCalifornia37 mi2,544,916
Los Angeles CountyCalifornia36 mi9,694,934
San Diego CountyCalifornia15 mi3,282,248
San Bernardino CountyCalifornia8.2 mi2,224,091

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.