Three Rivers is a somewhat small city located in the state of Michigan. With a population of 7,905 people and six associated neighborhoods, Three Rivers is the 140th largest community in Michigan. Three Rivers has an unusually large stock of pre-World War II architecture, making it one of the older and more historic cities.

The citizens of Three Rivers are slightly less educated than the national average of 21.84% for the average city or town: 15.60% of adults in Three Rivers have a bachelor's degree or advanced degree

The per capita income in Three Rivers in 2022 was $23,980, which is low income relative to Michigan and the nation. This equates to an annual income of $95,920 for a family of four. However, Three Rivers contains both very wealthy and poor people as well.

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

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