St. Clair is a very small city located in the state of Missouri. With a population of 4,748 people and three associated neighborhoods, St. Clair is the 141st largest community in Missouri.

Also of interest is that St. Clair 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 St. Clair telecommute to their jobs. Overall, about 7.60% 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 city is relatively quiet, having a combination of lower population density and few of those groups of people who have a tendency to be noisy. For example, St. Clair has relatively fewer families with younger children, and/or college students. Combined, this makes St. Clair a pretty quiet place to live overall. If you like quiet, you will probably enjoy it here.

Being a small city, St. Clair does not have a public transit system used by locals to get to and from work.

The citizens of St. Clair have a very low rate of college education: just 9.50% of people over 25 have a bachelor's degree or advanced degree, compared to a national average of 21.84% for all cities.

The per capita income in St. Clair in 2022 was $25,135, which is lower middle income relative to Missouri, and low income relative to the rest of the US. This equates to an annual income of $100,540 for a family of four. However, St. Clair contains both very wealthy and poor people as well.

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

The most common language spoken in St. Clair is English. Other important languages spoken here include Italian and Spanish.