
Fairfield township
- County:
- Butler County
- County Seat:
- No
- Area (mi²):
- 24.552
- State:
- Ohio
Fairfield township is located in Butler County, Ohio. Fairfield township has a 2025 population of 1,103. Fairfield township is currently declining at a rate of -0.27% annually and its population has decreased by -1.87% since the most recent census, which recorded a population of 1,124 in 2020.
The average household income in Fairfield township is $84,420 with a poverty rate of 3.38%. The median age in Fairfield township is 50.9 years: 57.6 years for males, and 41.9 years for females.