
Decatur township
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 33.317
- State:
- Ohio
Decatur township is located in Brown County, Ohio. Decatur township has a 2025 population of 605. Decatur township is currently declining at a rate of -0.49% annually and its population has decreased by -3.2% since the most recent census, which recorded a population of 625 in 2020.
The average household income in Decatur township is $55,604 with a poverty rate of 36.68%. The median age in Decatur township is 29.5 years: 29.6 years for males, and 27.6 years for females.