
Walnut township
- County:
- Fairfield County
- County Seat:
- No
- Area (mi²):
- 48.065
- State:
- Ohio
Walnut township is located in Fairfield County, Ohio. Walnut township has a 2025 population of 6,916. Walnut township is currently growing at a rate of 0.96% annually and its population has increased by 3.41% since the most recent census, which recorded a population of 6,688 in 2020.
The average household income in Walnut township is $94,570 with a poverty rate of 6%. The median age in Walnut township is 50.2 years: 47.6 years for males, and 52.2 years for females.