Marion is a medium-sized city located in the state of Illinois. With a population of 16,729 people and eight associated neighborhoods, Marion is the 153rd largest community in Illinois.

Also of interest is that Marion 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 Marion telecommute to their jobs. Overall, about 10.44% 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 Marion is somewhat higher than in the average US city of 21.84%: 27.72% of adults 25 and older in the city have at least a bachelor's degree.

The per capita income in Marion in 2018 was $36,935, which is upper middle income relative to Illinois and the nation. This equates to an annual income of $147,740 for a family of four. However, Marion contains both very wealthy and poor people as well.

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

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