
Allen township
- County:
- Union County
- County Seat:
- No
- Area (mi²):
- 29.623
- State:
- Ohio
Allen township is located in Union County, Ohio. Allen township has a 2025 population of 2,915. Allen township is currently growing at a rate of 3.88% annually and its population has increased by 21% since the most recent census, which recorded a population of 2,409 in 2020.
The average household income in Allen township is $143,752 with a poverty rate of 3.93%. The median age in Allen township is 45.9 years: 48.9 years for males, and 43.5 years for females.