Castle Hills is a very small city located in the state of Texas. With a population of 3,931 people and two associated neighborhoods, Castle Hills is the 446th largest community in Texas.

Castle Hills real estate is some of the most expensive in Texas, although Castle Hills house values don't compare to the most expensive real estate in the U.S.

Telecommuters are a relatively large percentage of the workforce: 13.85% 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 Castle Hills are among the most well-educated in the nation: 49.19% of adults in Castle Hills 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 Castle Hills in 2022 was $54,146, which is wealthy relative to Texas and the nation. This equates to an annual income of $216,584 for a family of four. However, Castle Hills contains both very wealthy and poor people as well.

Castle Hills is an extremely ethnically-diverse city. The people who call Castle Hills 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 Castle Hills, accounting for 55.24% of the city’s residents (people of Hispanic or Latino origin can be of any race). The greatest number of Castle Hills residents report their race to be White, followed by Asian. Important ancestries of people in Castle Hills include English, German, Irish, Scottish, and Greek.

The most common language spoken in Castle Hills is English. Other important languages spoken here include Spanish and Scandinavian languages.