
South Grove township
- County:
- DeKalb County
- County Seat:
- No
- Area (mi²):
- 34.409
- State:
- Illinois
South Grove township is located in DeKalb County, Illinois. South Grove township has a 2025 population of 406. South Grove township is currently declining at a rate of -0.98% annually and its population has decreased by -3.56% since the most recent census, which recorded a population of 421 in 2020.
The average household income in South Grove township is $118,648 with a poverty rate of 3.19%. The median age in South Grove township is 56.4 years: 56.7 years for males, and 54.3 years for females.