COUNTY · CA
Orange County, California
Orange County is a county in California with FIPS code 06059 and an estimated population of 3,135,755 (Census 2023), 3rd largest of 58 in the state.
County facts
- Name
- Orange County
- State
- California
- Type
- county
- FIPS code
- 06059
- State FIPS
- 06
- Population (2023)
- 3,135,755
- Change since 2020
- -1.6%
- State rank
- 3 of 58
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Orange County
Other counties in California
Questions
What is the FIPS code for Orange County?
Orange County, California has the five-digit FIPS code 06059: 06 for the state and 059 for the county.
What state is Orange County in?
Orange County is in California.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.