
Greencastle
- County:
- Putnam County
- County Seat:
- Yes
- Area (mi²):
- 5.212
- State:
- Indiana
Greencastle is a city located in Putnam County, Indiana. Greencastle has a 2025 population of 9,926. It is also the county seat of .Greencastle is currently growing at a rate of 0.22% annually and its population has increased by 1.13% since the most recent census, which recorded a population of 9,815 in 2020.
The average household income in Greencastle is $69,350 with a poverty rate of 8.68%. The median age in Greencastle is 28.7 years: 27.5 years for males, and 29.8 years for females.