[4] As of the 2020 census[8] there were 4,026 people, 1,560 households, and 1,056 families residing in the village.

There were 1,644 housing units at an average density of 1,029.43 per square mile (397.47/km2).

32.31% of all households were made up of individuals, and 9.68% had someone living alone who was 65 years of age or older.

South Chicago Heights is in Illinois's 2nd congressional district.

Pace provides bus service on Route 358 connecting South Chicago Heights to destinations across the Southland.