Grandville township
- County:
- Jasper County
- County Seat:
- No
- Area (mi²):
- 36.989
- State:
- Illinois
Grandville township is located in Jasper County, Illinois. Grandville township has a 2026 population of 350. Grandville township is currently declining at a rate of -0.57% annually and its population has decreased by -1.69% since the most recent census, which recorded a population of 356 in 2020.
The median household income in Grandville township is $49,250 with a poverty rate of 10.32%. The median age in Grandville township is 57 years: 57.7 years for males, and 54.5 years for females. For every 100 females there are 97.2 males.