Newcastle township
- County:
- Fulton County
- County Seat:
- No
- Area (mi²):
- 33.179
- State:
- Indiana
Newcastle township is located in Fulton County, Indiana. Newcastle township has a 2026 population of 1,354. Newcastle township is currently declining at a rate of -1.31% annually and its population has decreased by -1.1% since the most recent census, which recorded a population of 1,369 in 2020.
The median household income in Newcastle township is $48,889 with a poverty rate of 11.68%. The median age in Newcastle township is 40.8 years: 40.9 years for males, and 40.7 years for females. For every 100 females there are 91.3 males.