Castroville is a somewhat small town located in the state of California. With a population of 7,515 people and two associated neighborhoods, Castroville is the 456th largest community in California.

Housing costs in Castroville 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.

A relatively large number of people in Castroville telecommute to their jobs. Overall, about 7.53% of the workforce works from home. While this may seem like a small number, as a fraction of the total workforce it ranks among the highest in the country. 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.

In terms of college education, Castroville ranks among the least educated cities in the nation, as only 5.05% of people over 25 have a bachelor's degree or advanced degree.

The per capita income in Castroville in 2022 was $22,083, which is low income relative to California and the nation. This equates to an annual income of $88,332 for a family of four. However, Castroville contains both very wealthy and poor people as well.

Castroville is an extremely ethnically-diverse town. The people who call Castroville 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 Castroville, accounting for 91.25% of the town’s residents (people of Hispanic or Latino origin can be of any race). The greatest number of Castroville residents report their race to be White, followed by Black or African-American. Important ancestries of people in Castroville include Irish, English, Italian, Northern European, and Nigerian.

Castroville also has a high percentage of its population that was born in another country: 32.13%.

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