
Walnut Grove township
- County:
- McDonough County
- County Seat:
- No
- Area (mi²):
- 36.266
- State:
- Illinois
Walnut Grove township is located in McDonough County, Illinois. Walnut Grove township has a 2025 population of 461. Walnut Grove township is currently declining at a rate of 0% annually and its population has decreased by -0.65% since the most recent census, which recorded a population of 464 in 2020.
The average household income in Walnut Grove township is $89,864 with a poverty rate of 9.27%. The median age in Walnut Grove township is 45.6 years: 47.2 years for males, and 45.4 years for females.