Brea
- County:
- Orange County
- County Seat:
- No
- Area (mi²):
- 12.647
- State:
- California
Brea is a city located in Orange County, California. Brea has a 2026 population of 47,844. Brea is currently declining at a rate of -0.13% annually but its population has increased by 1.27% since the most recent census, which recorded a population of 47,242 in 2020.