Decker township
- County:
- Knox County
- County Seat:
- No
- Area (mi²):
- 44.338
- State:
- Indiana
Decker township is located in Knox County, Indiana. Decker township has a 2026 population of 213. Decker township is currently declining at a rate of -0.93% annually and its population has decreased by -0.93% since the most recent census, which recorded a population of 215 in 2020.
The median age in Decker township is 49.5 years: 49.3 years for males, and 63.2 years for females. For every 100 females there are 93.4 males.