South Jacksonville is a village in Morgan County, Illinois, United States.

Illinois Route 267 (Main Street) runs through the village center, leading north as Jacksonville's Main Street 2 miles (3 km) to the city center and south 6 miles (10 km) to Woodson.

Route 36 freeway runs along the southern edge of the village, with access from Exit 64 (IL 267).

34.2% of all households were made up of individuals, and 20.4% had someone living alone who was 65 years of age or older.

One notable attraction at the museum is its 2 ft (610 mm) narrow gauge[7] George Waters Memorial Railroad, powered by a real steam locomotive built by Crown Metal Products.