Placentia is a city located in California. With a 2020 population of 50,623, it is the 177th largest city in California and the 779th largest city in the United States. Placentia is currently declining at a rate of -0.60% annually but its population has increased by 0.18% since the most recent census, which recorded a population of 50,533 in 2010. Placentia reached it's highest population of 52,202 in 2015. Spanning over 7 miles, Placentia has a population density of 7,654 people per square mile.
The average household income in Placentia is $113,886 with a poverty rate of 8.09%. The median rental costs in recent years comes to $1,792 per month, and the median house value is $630,500. The median age in Placentia is 37.4 years, 36.1 years for males, and 38.6 years for females. For every 100 females there are 98.0 males.