Crystal Lake is a medium-sized city located in the state of Illinois. With a population of 40,661 people and 12 associated neighborhoods, Crystal Lake is the 40th largest community in Illinois.

Crystal Lake real estate is some of the most expensive in Illinois, although Crystal Lake house values don't compare to the most expensive real estate in the U.S.

Also of interest is that Crystal Lake 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: 12.99% 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.

Crystal Lake is a good choice for families with children because of several factors. Many other families with children live here, making it a place where both parents and children are more likely to develop social ties with other families. The city’s good public school district and large population of college-educated adults provide an environment conducive to academic success. Many people own their own single-family homes, providing areas for children to play and stability in the community. Finally, Crystal Lake’s overall crime rate ranks among the lowest in the country, making it one of the safest places to raise a family.

Crystal Lake is one of the most well-educated cities in the nation. 40.53% of adults in Crystal Lake have at least a bachelor's degree. Compare that to the average community in America, which has just 21.84% with a bachelor's degree or higher.

The per capita income in Crystal Lake in 2018 was $44,911, which is wealthy relative to Illinois and the nation. This equates to an annual income of $179,644 for a family of four.

Crystal Lake is a somewhat ethnically-diverse city. The people who call Crystal Lake home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Crystal Lake residents report their race to be White, followed by Asian. Crystal Lake also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 11.51% of the city’s residents. Important ancestries of people in Crystal Lake include German, Irish, Italian, Polish, and English.

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