Centreville is a very small city located in the state of Illinois. With a population of 4,167 people and three associated neighborhoods, Centreville is the 384th largest community in Illinois.

Telecommuters are a relatively large percentage of the workforce: 21.12% 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.

Despite the fact that it is a small city, Centreville has quite a few people who take public transportation – mostly the bus - for their daily commute to work. This helps to fill a real need in the city for affordable transportation.

The citizens of Centreville are slightly less educated than the national average of 21.84% for the average city or town: 15.66% of adults in Centreville have a bachelor's degree or advanced degree

The per capita income in Centreville in 2022 was $18,487, which is low income relative to Illinois and the nation. This equates to an annual income of $73,948 for a family of four. However, Centreville contains both very wealthy and poor people as well. Centreville also has one of the higher rates of people living in poverty in the nation, with 42.90% of its population below the federal poverty line.

The people who call Centreville home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Centreville residents report their race to be Black or African-American, followed by White. Important ancestries of people in Centreville include German, Irish, French, English, and African.

The most common language spoken in Centreville is English. Other important languages spoken here include Spanish and Native American languages.