Crest Hill is a medium-sized city located in the state of Illinois. With a population of 20,158 people and six associated neighborhoods, Crest Hill is the 119th largest community in Illinois.

The percentage of adults in Crest Hill who are college-educated is close to the national average for all communities of 21.84%: 20.97% of the adults in Crest Hill have a bachelor's degree or advanced degree.

The per capita income in Crest Hill in 2018 was $31,697, which is lower middle income relative to Illinois, and middle income relative to the rest of the US. This equates to an annual income of $126,788 for a family of four. However, Crest Hill contains both very wealthy and poor people as well.

Crest Hill is an extremely ethnically-diverse city. The people who call Crest Hill home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Crest Hill residents report their race to be White, followed by Black or African-American. Crest Hill also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 22.27% of the city’s residents. Important ancestries of people in Crest Hill include German, Italian, Irish, Polish, and English.

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