
Walnut township
- County:
- Gallia County
- County Seat:
- No
- Area (mi²):
- 40.893
- State:
- Ohio
Walnut township is located in Gallia County, Ohio. Walnut township has a 2025 population of 994. Walnut township is currently declining at a rate of -0.1% annually and its population has decreased by -0.9% since the most recent census, which recorded a population of 1,003 in 2020.
The average household income in Walnut township is $52,511 with a poverty rate of 21.86%. The median age in Walnut township is 29.8 years: 29.5 years for males, and 40.1 years for females.