Collinsville is a medium-sized city located in the state of Illinois. With a population of 23,972 people and nine associated neighborhoods, Collinsville is the 95th largest community in Illinois.

Also of interest is that Collinsville has more people living here who work in computers and math than 95% of the places in the US.

A relatively large number of people in Collinsville telecommute to their jobs. Overall, about 9.07% 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.

The overall education level of Collinsville citizens is substantially higher than the typical US community, as 29.03% of adults in Collinsville have at least a bachelor's degree, and the average American community has 21.84%.

The per capita income in Collinsville in 2018 was $39,666, which is upper middle income relative to Illinois and the nation. This equates to an annual income of $158,664 for a family of four. However, Collinsville contains both very wealthy and poor people as well.

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

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