South Elgin
- County:
- Kane County
- County Seat:
- No
- Area (mi²):
- 7.268
- State:
- Illinois
South Elgin is a village located in Kane County, Illinois. South Elgin has a 2026 population of 24,921. South Elgin is currently growing at a rate of 2.26% annually and its population has increased by 4.51% since the most recent census, which recorded a population of 23,846 in 2020.