Los Angeles County vs Orange County
Two neighbouring counties in California, compared on population, size, income and housing. They share 36 mi of border.
Los Angeles County
California
Orange County
California
Both outlines are drawn at true relative size. Los Angeles County spans about 229 km at its widest.
Side by side
| Measure | Los Angeles County | Difference | Orange County |
|---|---|---|---|
| Population | 9,694,934 | +207.8% | 3,149,507 |
| Change since 2020 | -3.0% | -1.8 pp | -1.2% |
| Land area | 4,060 sq mi | +411.9% | 793.2 sq mi |
| Population density | 2,388 per sq mi | -39.8% | 3,970 per sq mi |
| Median household income | $90,112 | -22.5% | $116,289 |
| Median home value | $834,200 | -13.3% | $962,600 |
| Median age | 38.2 | -3.0% | 39.4 |
| Households | 3,416,449 | +215.5% | 1,082,960 |
| Housing units | 3,650,466 | +218.5% | 1,146,169 |
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; US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. The difference column is computed here: the first county's figure against the second, expressed as a percentage of the second. The change-since-2020 row is the exception: two growth rates differ in percentage points (pp), not percent. Retrieved 30 August 2026.
What the numbers say
- Los Angeles County holds about 3.1 times the population of Orange County: 9,694,934 against 3,149,507.
- Los Angeles County covers more ground, at 4,060 square miles against 793.2.
- Orange County is the more crowded of the two, at 3,970 people per square mile against 2,388.
- Median household income is higher in Orange County, by 26,177 dollars a year.
- Since 2020, Los Angeles County has shrunk by 3.0% and Orange County has shrunk by 1.2%.
- They share 36 mi of common border, which the Census Bureau publishes in its county adjacency file and which almost no other county reference presents.
Full pages
Want a different pair? Compare any two of the 3,144 US counties.
Rebuilt from source data 30 August 2026. How these figures are produced.