
Greencastle township
- County:
- Putnam County
- County Seat:
- No
- Area (mi²):
- 34.324
- State:
- Indiana
Greencastle township is located in Putnam County, Indiana. Greencastle township has a 2025 population of 12,798. Greencastle township is currently growing at a rate of 0.21% annually and its population has increased by 1.59% since the most recent census, which recorded a population of 12,598 in 2020.
The average household income in Greencastle township is $79,801 with a poverty rate of 7.34%. The median age in Greencastle township is 30.8 years: 30 years for males, and 31.3 years for females.