
Orange County
- State:
- California
- County Seat:
- Santa Ana
Orange County's estimated 2025 population is 3,106,521 with a growth rate of -0.47% in the past year according to the most recent United States census data. Orange County is the 3rd largest county in California. The 2010 population was 3,016,376 and has seen a growth of 2.99% since that time.