St. Clair is a somewhat small city located in the state of Michigan. With a population of 5,468 people and four associated neighborhoods, St. Clair is the 180th largest community in Michigan.

As is often the case in a small city, St. Clair doesn't have a public transportation system that people use for their commute.

The overall education level of St. Clair is somewhat higher than in the average US city of 21.84%: 26.34% of adults 25 and older in the city have at least a bachelor's degree.

The per capita income in St. Clair in 2022 was $44,068, which is wealthy relative to Michigan, and upper middle income relative to the rest of the US. This equates to an annual income of $176,272 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 Polish and Italian.