Placentia is a larger medium-sized city located in the state of California. With a population of 53,395 people and 11 associated neighborhoods, Placentia is the 177th largest community in California.

Housing costs in Placentia are among some of the highest in the nation, although real estate prices here don't compare to real estate prices in the most expensive communities in California.

Also of interest is that Placentia has more people living here who work in computers and math than 95% of the places in the US.

Telecommuters are a relatively large percentage of the workforce: 15.39% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

The citizens of Placentia are among the most well-educated in the nation: 44.23% of adults in Placentia have a bachelor's degree or even advanced degree, whereas the average US city has 21.84% holding at least a bachelor's degree.

The per capita income in Placentia in 2022 was $48,006, which is upper middle income relative to California and the nation. This equates to an annual income of $192,024 for a family of four. However, Placentia contains both very wealthy and poor people as well.

Placentia is an extremely ethnically-diverse city. The people who call Placentia home describe themselves as belonging to a variety of racial and ethnic groups. People of Hispanic or Latino origin are the most prevalent group in Placentia, accounting for 37.85% of the city’s residents (people of Hispanic or Latino origin can be of any race). The greatest number of Placentia residents report their race to be White, followed by Asian. Important ancestries of people in Placentia include German, Irish, English, Italian, and Scottish.

Foreign born people are also an important part of Placentia's cultural character, accounting for 23.98% of the city’s population.

The most common language spoken in Placentia is English. Other important languages spoken here include Spanish and Chinese.