
Placentia
- County:
- Orange County
- County Seat:
- No
- Area (mi²):
- 6.732
- State:
- California
Placentia is a city located in Orange County, California. Placentia has a 2025 population of 51,872. Placentia is currently declining at a rate of -0.31% annually and its population has decreased by -1.52% since the most recent census, which recorded a population of 52,671 in 2020.
The average household income in Placentia is $138,818 with a poverty rate of 8.51%. The median age in Placentia is 38 years: 36.8 years for males, and 38.8 years for females.