Marion township
- County:
- Grant County
- County Seat:
- No
- Area (mi²):
- 35.406
- State:
- Indiana
Marion township is located in Grant County, Indiana. Marion township has a 2026 population of 684. Marion township is currently growing at a rate of 0.15% annually but its population has decreased by -0.29% since the most recent census, which recorded a population of 686 in 2020.
The median age in Marion township is 44.2 years: 49 years for males, and 43.5 years for females. For every 100 females there are 103.2 males.