O'Fallon is a medium-sized city located in the state of Illinois. With a population of 32,140 people and seven associated neighborhoods, O'Fallon is the 59th largest community in Illinois.

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

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

One interesting thing about the economy is that relatively large numbers of people worked from their home: 13.02% of the workforce. While this number may seem small overall, as a fraction of the total workforce this is high compared to the rest of the county. 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.

Because of many things, O'Fallon is a very good place for families to consider. With an enviable combination of good schools, low crime, college-educated neighbors who tend to support education because of their own experiences, and a high rate of home ownership in predominantly single-family properties, O'Fallon really has some of the features that families look for when choosing a good community to raise children. Is O'Fallon perfect? Of course not, and if you like frenetic nightlife, it will be far from your cup of tea. But overall this is a solid community, with many things to recommend it as a family-friendly place to live.

Do you have a 4-year college degree or graduate degree? If so, you may feel right at home in O'Fallon. 50.55% of adults here have a 4-year degree or graduate degree, whereas the national average for all cities and towns is just 21.84%.

The per capita income in O'Fallon in 2018 was $47,901, which is wealthy relative to Illinois and the nation. This equates to an annual income of $191,604 for a family of four.

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

The most common language spoken in O'Fallon is English. Other important languages spoken here include Spanish and German/Yiddish.