Decker
- County:
- Knox County
- County Seat:
- No
- Area (mi²):
- 0.188
- State:
- Indiana
Decker is a town located in Knox County, Indiana. Decker has a 2026 population of 198. Decker is currently growing at a rate of 0.51% annually and its population has decreased by 0% since the most recent census, which recorded a population of 198 in 2020.
The median age in Decker is 49.9 years: 45 years for males, and 53.3 years for females. For every 100 females there are 112.2 males.