
Richland Grove township
- County:
- Mercer County
- County Seat:
- No
- Area (mi²):
- 36.379
- State:
- Illinois
Richland Grove township is located in Mercer County, Illinois. Richland Grove township has a 2025 population of 2,293. Richland Grove township is currently declining at a rate of -0.13% annually and its population has decreased by -0.82% since the most recent census, which recorded a population of 2,312 in 2020.
The average household income in Richland Grove township is $108,382 with a poverty rate of 9.54%. The median age in Richland Grove township is 47.5 years: 45.7 years for males, and 48.7 years for females.