Fairfield township
- County:
- Franklin County
- County Seat:
- No
- Area (mi²):
- 13.325
- State:
- Indiana
Fairfield township is located in Franklin County, Indiana. Fairfield township has a 2026 population of 531. Fairfield township is currently growing at a rate of 0.38% annually and its population has increased by 3.91% since the most recent census, which recorded a population of 511 in 2020.
The median age in Fairfield township is 41.7 years: 41.3 years for males, and 42.4 years for females. For every 100 females there are 140.1 males.