Belle Fourche is a somewhat small city located in the state of South Dakota. With a population of 5,855 people and two associated neighborhoods, Belle Fourche is the 18th largest community in South Dakota.

The education level of Belle Fourche citizens, measured as those with bachelor's degrees or advanced degrees, is similar to the national average for all American cities and towns. 17.13% of adults 25 and older in Belle Fourche have a college degree.

The per capita income in Belle Fourche in 2022 was $38,513, which is upper middle income relative to South Dakota and the nation. This equates to an annual income of $154,052 for a family of four. However, Belle Fourche contains both very wealthy and poor people as well.

The people who call Belle Fourche home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Belle Fourche residents report their race to be White, followed by Native American. Important ancestries of people in Belle Fourche include German, English, Irish, Norwegian, and European.

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