
Gardner township
- County:
- Grundy County
- County Seat:
- No
- Area (mi²):
- 42.557
- State:
- Illinois
Gardner township is located in Grundy County, Illinois. Gardner township has a 2025 population of 4,533. Gardner township is currently declining at a rate of -0.42% annually and its population has decreased by -2.43% since the most recent census, which recorded a population of 4,646 in 2020.
The average household income in Gardner township is $132,292 with a poverty rate of 2.04%. The median age in Gardner township is 42.2 years: 42.8 years for males, and 38.2 years for females.