How many people live in Orange County, CA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 3.17 million people living in Orange County, CA. That makes Orange County the sixth-most populous county in the US. It is also the third-largest in California, accounting for 8.1% of the state’s population.
3.17M
population of Orange County, CA (2024)
8.1%
County share of the California population (2024)
About 3.17 million people lived in Orange County, CA in 2024.
Population estimates, 2000–2024
What are Orange County, CA’s age demographics?
About 550,300 Orange County, CA residents are aged 65 and older in 2024. That represents 17.4% of its population. For comparison, the age group represents 16.6% of California’s population and 18% in the US overall.
Another 642,900 Orange County, CA residents, or 20.3% of the population, were children under 18. For comparison, the age group represents 21.4% of California’s population and 21.6% in the US overall.
A higher share of Orange County, CA's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Orange County, CA’s racial and ethnic demographics?
Hispanic residents make up 34.3% of the Orange County, CA population, higher than the national share of 20%. Orange County also has a larger share of people identifying as non-Hispanic Asian (23.8%) than the US overall (6.5%).
In contrast, Orange County’s non-Hispanic white population accounts for 36.7%, below the 57.5% nationwide, and the non-Hispanic Black or African American population makes up 1.7% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Orange County, CA has a higher share of a non-Hispanic Asian population than California as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Orange County, CA is Anaheim with about 344,600 residents in 2024.
Cities and towns in Orange County, CA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Anaheim | 344,561 |
| 2. | Irvine | 318,683 |
| 3. | Santa Ana | 316,184 |
| 4. | Huntington Beach | 193,151 |
| 5. | Garden Grove | 172,361 |
| 6. | Fullerton | 140,054 |
| 7. | Orange | 137,941 |
| 8. | Costa Mesa | 109,131 |
| 9. | Mission Viejo | 91,601 |
| 10. | Westminster | 89,537 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
