Decatur township
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 34.888
- State:
- Ohio
Decatur township is located in Brown County, Ohio. Decatur township has a 2026 population of 1,296. Decatur township is currently declining at a rate of -0.08% annually and its population has decreased by -1.07% since the most recent census, which recorded a population of 1,310 in 2020.
The median household income in Decatur township is $72,554 with a poverty rate of 14.11%. The median age in Decatur township is 40.8 years: 40.2 years for males, and 41.8 years for females. For every 100 females there are 117.4 males.