South Beloit is a somewhat small city located in the state of Illinois. With a population of 7,893 people and two associated neighborhoods, South Beloit is the 262nd largest community in Illinois.

The citizens of South Beloit are slightly better educated than the national average of 21.84% for all cities and towns, with 24.64% of adults in South Beloit having a bachelor's degree or advanced degree.

The per capita income in South Beloit in 2022 was $36,108, which is middle income relative to Illinois and the nation. This equates to an annual income of $144,432 for a family of four. However, South Beloit contains both very wealthy and poor people as well.

South Beloit is a very ethnically-diverse city. The people who call South Beloit home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of South Beloit residents report their race to be White, followed by Black or African-American. South Beloit also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 10.68% of the city’s residents. Important ancestries of people in South Beloit include German, English, Irish, Swedish, and Italian.

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