
Walnut Grove township
- County:
- Knox County
- County Seat:
- No
- Area (mi²):
- 35.563
- State:
- Illinois
Walnut Grove township is located in Knox County, Illinois. Walnut Grove township has a 2025 population of 653. Walnut Grove township is currently declining at a rate of -0.31% annually and its population has decreased by -3.55% since the most recent census, which recorded a population of 677 in 2020.
The average household income in Walnut Grove township is $77,750 with a poverty rate of 8.29%. The median age in Walnut Grove township is 52 years: 57.9 years for males, and 51.4 years for females.